NSC COPEK988V, COPEK988N, COPEK984N, COPEK888V, COPEK888N Datasheet
...
COP888EK
8-Bit CMOS ROM Based Microcontrollers with 8k
Memory, Comparator, and Single-slope A/D Capability
General Description
The COP888EK ROM based microcontrollers are highly integrated COP8
™
Feature core devices with 8k memory and
advanced features including a Multi-Input Comparator and
Single-slope A/D capability. These single-chip CMOS devices are suited for applications requiring a full featured, low
EMI controller with an analog comparator, current source,
and voltage reference. The COP87L88EK/RK Family devices are pin and software compatible (different V
CC
range)
16k or 32k OTP (One Time Programmable) versions for preproduction, and for use with a range of COP8 software and
hardware development tools.
Family features include an 8-bit memory mapped architecture, 10 MHz CKI with 1µs instruction cycle, three multifunction 16-bit timer/counters with PWM, MICROWIRE/
PLUS
™
serial I/O, one analog comparator with seven input
multiplexor, an analog current source and V
CC
reference,
two power saving HALT/IDLE modes, idle timer, MIWU, high
current outputs, software selectable I/O options, WATCHDOG
™
timer and Clock Monitor, Low EMI 2.5V to 6.0V op-
eration and 28/40/44 pin packages.
Devices included in this datasheet are:
Device Memory (bytes) RAM (bytes) I/O Pins Packages Temperature Comments
COP684EK 8k ROM 256 24 28 DIP/SOIC -55 to +125˚C 4.5V - 5.5V
COP884EK 8k ROM 256 24 28 DIP/SOIC -40 to +85˚C
COP984EK 8k ROM 256 24 28 DIP/SOIC 0 to +70˚C 2.5V - 4.0V, EKH=4.0V - 6.0V
COP688EK 8k ROM 256 36/40 40 DIP, 44 PLCC -55 to +125˚C 4.5V - 5.5V
COP888EK 8k ROM 256 36/40 40 DIP, 44 PLCC -40 to +85˚C
COP988EK 8k ROM 256 36/40 40 DIP, 44 PLCC 0 to +70˚C 2.5V - 4.0V, EKH=4.0V - 6.0V
Key Features
n Analog function block with
— Analog comparator with seven input multiplexor
— Constant current source and V
CC
/2 reference
n Three 16-bit timers, each with two 16-bit registers
supporting:
— Processor Independent PWM mode
— External Event counter mode
— Input Capture mode
n 8 kbytes of on-chip ROM
n 256 bytes of on-chip RAM
Additional Peripheral Features
n Idle Timer
n Multi-Input Wake Up (MIWU) with optional interrupts (8)
n WATCHDOG and Clock Monitor logic
n MICROWIRE/PLUS serial I/O
I/O Features
n Software selectable I/O options (TRI-STATE™Output,
Push-Pull Output, Weak Pull-Up Input, High Impedance
Input)
n High current outputs
n Schmitt trigger inputs on Port G and L
n Packages: 44 PLCC with 40 I/O pins, 40 DIP with 36 I/O
pins, and 28 DIP/SO with 24 I/O pins
CPU/Instruction Set Feature
n 1 µs instruction cycle time
n Twelve multi-source vectored interrupts servicing
— External Interrupt with selectable edge
— Idle Timer T0
— Three Timers (Each with 2 interrupts)
— MICROWIRE/PLUS
— Multi-Input Wake Up
— Software Trap
— Default VIS (default interrupt)
n Versatile and easy to use instruction set
n 8-bit Stack Pointer (SP)—stack in RAM
n Two 8-bit Register Indirect Data Memory Pointers
(B, X)
Fully Static CMOS
n Single supply operation: 2.5V to 6.0V
n Temperature ranges: 0˚C to +70˚C, −40˚C to +85˚C, and
−55˚C to +125˚C
COP8™, MICROWIRE/PLUS™, and WATCHDOG™are trademarks of National Semiconductor Corporation.
TRI-STATE
®
is a registered trademark of National Semiconductor Corporation.
iceMASTER
®
is a registered trademark of MetaLink Corporation.
OBSOLETE
January 2000
COP888EK 8-Bit CMOS ROM Based Microcontrollers with 8k Memory, Comparator, and
Single-slope A/D Capability
© 2000 National Semiconductor Corporation DS012094 www.national.com
Development Support
n Emulation and OTP devices
n Real time emulation and full program debug offered by
MetaLink Development System
Block Diagram
DS012094-1
FIGURE 1. Block Diagram
COP888EK
www.national.com 2
Connection Diagrams
Plastic Chip Carrier
DS012094-2
Top View
Order Number COP688EK-XXX/V, COP888EK-XXX/V,
COP988EK-XXX/V or COP988EKH-XXX/V
See NS Plastic Chip Package Number V44A
Dual-In-Line Package
DS012094-3
Top View
Order Number COP688EK-XXX/N, COP888EK-XXX/N,
COP988EK-XXX/N or COP988EKH-XXX/N
See NS Molded Package Number N40A
Dual-In-Line Package
DS012094-4
Top View
Order Number COP684EK-XXX/N, COP884EK-XXX/N, COP984EK-XXX/N or COP984EKH-XXX/N
See NS Molded Package Number N28B
Order Number COP684EK-XXX/WM, COP884EK-XXX/WM, COP984EK-XXX/WM or COP984EKH-XXX/WM
See NS Molded Package Number M28B
FIGURE 2. Connection Diagrams
COP888EK
www.national.com3
Connection Diagrams (Continued)
Pinouts for 28-, 40- and 44-Pin Packages
Port Type Alt. Fun Alt. Fun
28-Pin 40-Pin 44-Pin
Pack. Pack. Pack.
L0 I/O MIWU 11 17 17
L1 I/O MIWU 12 18 18
L2 I/O MIWU 13 19 19
L3 I/O MIWU 14 20 20
L4 I/O MIWU T2A 15 21 25
L5 I/O MIWU T2B 16 22 26
L6 I/O MIWU T3A 17 23 27
L7 I/O MIWU T3B 18 24 28
G0 I/O INT 25 35 39
G1 WDOUT 26 36 40
G2 I/O T1B 27 37 41
G3 I/O T1A 28 38 42
G4 I/O SO 1 3 3
G5 I/O SK 2 4 4
G6ISI 355
G7 I/CKO HALT Restart 4 6 6
D0O 192529
D1O 202630
D2O 212731
D3O 222832
I0 I COMPIN1+ 7 9 9
I1 I COMPIN−/Current 8 10 10
Source Out
I2 I COMPIN0+ 9 11 11
I3 I COMPOUT/COMPIN2+ 10 12 12
I4 I COMPIN3+ 13 13
I5 I COMPIN4+ 14 14
I6 I COMPIN5+ 15 15
I7 I COMPOUT 16 16
D4 O 29 33
D5 O 30 34
D6 O 31 35
D7 O 32 36
C0 I/O 39 43
C1 I/O 40 44
C2 I/O 1 1
C3 I/O 2 2
C4 I/O 21
C5 I/O 22
C6 I/O 23
C7 I/O 24
V
CC
688
GND 23 33 37
CKI 5 7 7
RESET
24 34 38
COP888EK
www.national.com 4
Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Supply Voltage (V
CC
)7V
Voltage at Any Pin −0.3V to V
CC
+ 0.3V
Total Current into V
CC
Pin (Source) 100 mA
Total Current out of GND Pin (Sink) 110 mA
Storage Temperature Range −65˚C to +140˚C
Note 1:
Absolute maximum ratings indicate limits beyond which damage to
the device may occur. DC and AC electrical specifications are not ensured
when operating the device at absolute maximum ratings.
DC Electrical Characteristics 98xEK:
0˚C ≤ TA≤ + 70˚C unless otherwise specified
Parameter Conditions Min Typ Max Units
Operating Voltage COP98XEK 2.5 4.0 V
COP98XEKH 4.0 6.0 V
Power Supply Ripple (Note 3) Peak-to-Peak 0.1 V
CC
V
Supply Current (Note 4)
CKI=10 MHz V
CC
=
6.0V, t
c
=
1 µs 10.0 mA
CKI=4 MHz V
CC
=
2.5V, t
c
=
2.5 µs 1.7 mA
HALT Current (Note 5) V
CC
=
6.0V, CKI=0 MHz
<
48 µA
V
CC
=
4.0V, CKI=0 MHz
<
34 µA
IDLE Current (Note 4)
CKI=10 MHz V
CC
=
6.0V, t
c
=
1 µs 0.4 1.7 mA
CKI=4 MHz V
CC
=
2.5V, t
c
=
2.5 µs 0.2 0.5 mA
Input Levels (V
IH,VIL
)
RESET
Logic High 0.8 V
CC
V
Logic Low 0.2 V
CC
V
CKI, All Other Inputs
Logic High 0.7 V
CC
V
Logic Low 0.2 V
CC
V
Hi-Z Input Leakage V
CC
=
6.0V −1 +1 µA
Input Pullup Current V
CC
=
6.0V, V
IN
=
0V −40 −250 µA
G and L Port Input Hysteresis (Note 8) 0.35 V
CC
V
Output Current Levels
D Outputs
Source V
CC
=
4.0V, V
OH
=
3.3V −0.4 mA
V
CC
=
2.5V, V
OH
=
1.8V −0.2 mA
Sink V
CC
=
4.0V, V
OL
=
1V 10 mA
V
CC
=
2.5V, V
OL
=
0.4V 2.0 mA
All Others
Source (Weak Pull-Up Mode) V
CC
=
4.0V, V
OH
=
2.7V −10 −110 µA
V
CC
=
2.5V, V
OH
=
1.8V −2.5 −33 µA
Source (Push-Pull Mode) V
CC
=
4.0V, V
OH
=
3.3V −0.4 mA
V
CC
=
2.5V, V
OH
=
1.8V −0.2 mA
Sink (Push-Pull Mode) V
CC
=
4.0V, V
OL
=
0.4V 1.6 mA
V
CC
=
2.5V, V
OL
=
0.4V 0.7 mA
TRI-STATE Leakage V
CC
=
6.0V −1 +1 µA
Allowable Sink/Source Current per Pin
(Note 8)
D Outputs (Sink) 15 mA
All others 3mA
Maximum Input Current Room Temp
±
100 mA
without Latchup (Note 6)
RAM Retention Voltage, V
r
500 ns Rise and Fall Time (Min) 2 V
COP888EK
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DC Electrical Characteristics 98xEK: (Continued)
0˚C ≤ TA≤ + 70˚C unless otherwise specified
Parameter Conditions Min Typ Max Units
Input Capacitance 7pF
Load Capacitance on D2 1000 pF
AC Electrical Characteristics 98xEK:
0˚C ≤ TA≤ + 70˚C unless otherwise specified
Parameter Conditions Min Typ Max Units
Instruction Cycle Time (t
c
)
Crystal, Resonator, 4.0V ≤ V
CC
≤ 6.0V 1.0 DC µs
2.5V ≤ V
CC
<
4.0V 2.5 DC µs
R/C Oscillator 4.0V ≤ V
CC
≤ 6.0V 3.0 DC µs
2.5V ≤ V
CC
<
4.0V 7.5 DC µs
Inputs
t
SETUP
4.0V ≤ VCC≤ 6.0V 200 ns
2.5V ≤ V
CC
<
4.0V 500 ns
t
HOLD
4.0V ≤ VCC≤ 6.0V 60 ns
2.5V ≤ V
CC
<
4.0V 150 ns
Output Propagation Delay (Note 7) R
L
=
2.2k, C
L
=
100 pF
t
PD1,tPD0
SO, SK 4.0V ≤ VCC≤ 6.0V 0.7 µs
2.5V ≤ V
CC
<
4.0V 1.75 µs
All Others 4.0V ≤ V
CC
≤ 6.0V 1 µs
2.5V ≤ V
CC
<
4.0V 2.5 µs
MICROWIRE
™
Setup Time (t
UWS
) (Note 7) VCC≥ 4.0V 20 ns
MICROWIRE Hold Time (t
UWH
) (Note 7) VCC≥ 4.0V 56 ns
MICROWIRE Output Propagation Delay (t
UPD
)VCC≥ 4.0V 220 ns
Input Pulse Width (Note 8)
Interrupt Input High Time 1.0 t
c
Interrupt Input Low Time 1.0 t
c
Timer 1, 2, 3 Input High Time 1.0 t
c
Timer 1, 2, 3 Input Low Time 1.0 t
c
Reset Pulse Width 1.0 µs
Note 2: t
c
=
Instruction Cycle Time
Note 3: Maximum rate of voltage change must be
<
0.5 V/ms.
Note 4: Supply and IDLE currents are measured with CKI driven with a square wave Oscillator, CKO driven 180˚ out of phase with CKI, inputs connected to V
CC
and outputs driven low but not connected to a load.
Note 5: The HALT mode will stop CKI from oscillating in the RC and the Crystal configurations. Measurement of I
DD
HALTis done with device neither sourcing nor
sinking current; with L, C, and G0–G5 programmed as low outputs and not driving a load; all outputs programmed low and not driving a load; all inputs tied to V
CC
;
clock monitor and comparator disabled. Parameter refers to HALTmode entered via setting bit 7 of the G Port data register. Part will pull up CKI during HALTincrystal
clock mode.
Note 6: Pins G6 and RESET are designed with a high voltage input network. These pins allow input voltages
>
VCCand the pins will have sink current to VCCwhen
biased at voltages>VCC(the pins do not have source current when biased at a voltage below VCC). The effective resistance to VCCis 750Ω (typical). These two
pins will not latch up. The voltage at the pins must be limited to
<
14V.WARNING: Voltages in excess of 14V will cause damage to the pins. This warning ex-
cludes ESD transients.
Note 7: The output propagation delay is referenced to the end of the instruction cycle where the output change occurs.
Note 8: Parameter characterized but not tested.
COP888EK
www.national.com 6
Absolute Maximum Ratings (Note 9)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Supply Voltage (V
CC
)7V
Voltage at Any Pin −0.3V to V
CC
+ 0.3V
Total Current into V
CC
Pin (Source) 100 mA
Total Current out of GND Pin (Sink) 110 mA
Storage Temperature Range −65˚C to +140˚C
Note 9:
Absolute maximum ratings indicate limits beyond which damage to
the device may occur. DC and AC electrical specifications are not ensured
when operating the device at absolute maximum ratings.
DC Electrical Characteristics 88xEK:
−40˚C ≤ TA≤ +85˚C unless otherwise specified
Parameter Conditions Min Typ Max Units
Operating Voltage 2.5 6.0 V
Power Supply Ripple (Note 11) Peak-to-Peak 0.1 V
CC
V
Supply Current (Note 12)
CKI=10 MHz V
CC
=
6.0V, t
c
=
1 µs 10.0 mA
CKI=4 MHz V
CC
=
2.5V, t
c
=
2.5 µs 1.7 mA
HALT Current (Note 13) V
CC
=
6.0V, CKI=0 MHz
<
410 µA
IDLE Current (Note 12)
CKI=10 MHz V
CC
=
6.0V, t
c
=
1 µs 0.4 1.7 mA
CKI=4 MHz V
CC
=
6.0V, t
c
=
2.5 µs 0.2 0.5 mA
Input Levels (V
IH,VIL
)
RESET
Logic High 0.8 V
CC
V
Logic Low 0.2 V
CC
V
CKI, All Other Inputs
Logic High 0.7 V
CC
V
Logic Low 0.2 V
CC
V
Hi-Z Input Leakage V
CC
=
6.0V −2 +2 µA
Input Pullup Current V
CC
=
6.0V, V
IN
=
0V −40 −250 µA
G and L Port Input Hysteresis (Note 16) 0.35 V
CC
V
Output Current Levels
D Outputs
Source V
CC
=
4.0V, V
OH
=
3.3V −0.4 mA
V
CC
=
2.5V, V
OH
=
1.8V −0.2 mA
Sink V
CC
=
4.0V, V
OL
=
1V 10 mA
V
CC
=
2.5V, V
OL
=
0.4V 2.0 mA
All Others
Source (Weak Pull-Up Mode) V
CC
=
4.0V, V
OH
=
2.7V −10 −100 µA
V
CC
=
2.5V, V
OH
=
1.8V −2.5 −33 µA
Source (Push-Pull Mode) V
CC
=
4.0V, V
OH
=
3.3V −0.4 mA
V
CC
=
2.5V, V
OH
=
1.8V −0.2 mA
Sink (Push-Pull Mode) V
CC
=
4.0V, V
OL
=
0.4V 1.6 mA
V
CC
=
2.5V, V
OL
=
0.4V 0.7 mA
TRI-STATE Leakage V
CC
=
6.0V −2 +2 µA
Allowable Sink/Source Current per Pin
(Note 16)
D Outputs (Sink) 15 mA
All others 3mA
Maximum Input Current Room Temp
±
100 mA
without Latchup (Note 14)
RAM Retention Voltage, V
r
500 ns Rise 2 V
and Fall Time (min)
Input Capacitance 7pF
COP888EK
www.national.com7
DC Electrical Characteristics 88xEK: (Continued)
−40˚C ≤ TA≤ +85˚C unless otherwise specified
Parameter Conditions Min Typ Max Units
Load Capacitance on D2 1000 pF
AC Electrical Characteristics 88xEK:
−40˚C ≤ TA≤ +85˚C unless otherwise specified
Parameter Conditions Min Typ Max Units
Instruction Cycle Time (t
c
)
Crystal, Resonator, 4.0V ≤ V
CC
≤ 6.0V 1.0 DC µs
2.5V ≤ V
CC
<
4.0V 2.5 DC µs
R/C Oscillator 4.0V ≤ V
CC
≤ 6.0V 3.0 DC µs
2.5V ≤ V
CC
≤ 4.0V 7.5 DC µs
Inputs
t
SETUP
4.0V ≤ VCC≤ 6.0V 200 ns
2.5V ≤ V
CC
<
4.0V 500 ns
t
HOLD
4.0V ≤ VCC≤ 6.0V 60 ns
2.5V ≤ V
CC
<
4.0V 150 ns
Output Propagation Delay (Note 15) R
L
=
2.2k, C
L
=
100 pF
t
PD1,tPD0
SO, SK 4.0V ≤ VCC≤ 6.0V 0.7 µs
2.5V ≤ V
CC
<
4.0V 1.75 µs
All Others 4.0V ≤ V
CC
≤ 6.0V 1.0 µs
2.5V ≤ V
CC
<
4.0V 2.5 µs
MICROWIRE Setup Time (t
UWS
) (Note 15) 20 ns
MICROWIRE Hold Time (t
UWH
) (Note 15) 56 ns
MICROWIRE Output Propagation Delay (t
UPD
) 220 ns
Input Pulse Width (Note 16)
Interrupt Input High Time 1.0 t
c
Interrupt Input Low Time 1.0 t
c
Timer 1, 2, 3 Input High Time 1.0 t
c
Timer 1, 2, 3 Input Low Time 1.0 t
c
Reset Pulse Width 1.0 µs
Note 10: t
c
=
Instruction Cycle Time
Note 11: Maximum rate of voltage change must be
<
0.5 V/ms.
Note 12: Supply and IDLE currents are measured with CKI driven with a square wave Oscillator, CKO driven 180˚ out of phase with CKI, inputs connected to V
CC
and outputs driven low but not connected to a load.
Note 13: The HALTmode will stop CKI from oscillating in the RC and the Crystal configurations. Measurement of I
DD
HALTis done with device neither sourcing nor
sinking current; with L, C, G0, and G2–G5 programmed as low outputs and not driving a load; all outputs programmed low and not driving a load; all inputs tied to
V
CC
; clock monitor and comparator disabled. Parameter refers to HALT mode entered via setting bit 7 of the G Port data register. Part will pull up CKI during HALT
in crystal clock mode.
Note 14: Pins G6 and RESET are designed with a high voltage input network. These pins allow input voltages
>
VCCand the pins will have sink current to VCCwhen
biased at voltages>VCC(the pins do not have source current when biased at a voltage below VCC). The effective resistance to VCCis 750Ω (typical). These two
pins will not latch up. The voltage at the pins must be limited to
<
14V.WARNING: Voltages in excess of 14V will cause damage to the pins. This warning ex-
cludes ESD transients.
Note 15: The output propagation delay is referenced to the end of the instruction cycle where the output change occurs.
Note 16: Parameter characterized but not tested.
COP888EK
www.national.com 8
Absolute Maximum Ratings (Note 17)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Supply Voltage (V
CC
)7V
Voltage at Any Pin −0.3V to V
CC
+ 0.3V
Total Current into V
CC
Pin (Source) 100 mA
Total Current out of GND Pin (Sink) 110 mA
Storage Temperature Range −65˚C to +140˚C
Note 17:
Absolute maximum ratings indicate limits beyond which damage to
the device may occur. DC and AC electrical specifications are not ensured
when operating the device at absolute maximum ratings.
DC Electrical Characteristics 68xEK:
−55˚C ≤ TA≤ +125˚C unless otherwise specified
Parameter Conditions Min Typ Max Units
Operating Voltage 4.5 5.5 V
Power Supply Ripple (Note 19) Peak-to-Peak 0.1 V
CC
V
Supply Current (Note 22) V
CC
=
5.5V, t
c
=
1 µs 12.5 mA
CKI=10 MHz
HALT Current (Note 21) V
CC
=
5.5V, CKI=0 MHz
<
10 30 µA
IDLE Current (Note 22)
CKI=10 MHz V
CC
=
5.5V, t
c
=
1 µs 1.7 mA
Input Levels (V
IH,VIL
)
RESET
Logic High 0.8 V
CC
V
Logic Low 0.2 V
CC
V
CKI, All Other Inputs
Logic High 0.7 V
CC
V
Logic Low 0.2 V
CC
V
Hi-Z Input Leakage V
CC
=
5.5V −5 +5 µA
Input Pullup Current V
CC
=
5.5V, V
IN
=
0V −35 −400 µA
G and L Port Input Hysteresis (Note 24) 0.35 V
CC
V
Output Current Levels
D Outputs
Source V
CC
=
4.5V, V
OH
=
3.3V −0.4 mA
Sink V
CC
=
4.5V, V
OL
=
1.0V 9.0 mA
All Others
Source (Weak Pull-Up Mode) V
CC
=
4.5V, V
OH
=
2.7V −9.0 −110 µA
Source (Push-Pull Mode) V
CC
=
4.5V, V
OH
=
3.3V −0.4 mA
Sink (Push-Pull Mode) V
CC
=
4.5V, V
OL
=
0.4V 1.6 mA
TRI-STATE Leakage V
CC
=
5.5V −5.0 +5 µA
Allowable Sink/Source Current per Pin
D Outputs (Sink) 12 mA
All others 2.5 mA
Maximum Input Current Room Temp
±
100 mA
without Latchup (Note 22)
RAM Retention Voltage, V
r
500 ns Rise and 2 1.5 V
and Fall Time (min)
Input Capacitance 7pF
Load Capacitance on D2 1000 pF
COP888EK
www.national.com9
AC Electrical Characteristics 68xEK:
−55˚C ≤ TA≤ +125˚C unless otherwise specified
Parameter Conditions Min Typ Max Units
Instruction Cycle Time (t
c
)
Crystal, Resonator 4.5V ≤ V
CC
≤ 5.5V 1.0 DC µs
R/C Oscillator 4.5V ≤ V
CC
<
5.5V 3.0 DC µs
Inputs
t
SETUP
4.5V ≤ VCC≤ 5.5V 200 ns
t
HOLD
4.5V ≤ VCC≤ 5.5V 60 ns
Output Propagation Delay (Note 23) R
L
=
2.2k, C
L
=
100 pF
t
PD1,tPD0
SO, SK 4.5V ≤ VCC≤ 5.5V 0.7 µs
All Others 4.5V ≤ V
CC
≤ 5.5V 1.0 µs
MICROWIRE Setup Time (t
UWS
) (Note 23) VCC≥ 4.5V 20 ns
MICROWIRE Hold Time (t
UWH
) (Note 23) VCC≥ 4.5V 56 ns
MICROWIRE Output Propagation Delay (t
UPD
)VCC≥ 4.5V 220 ns
Input Pulse Width (Note 24)
Interrupt Input High Time 1.0 t
c
Interrupt Input Low Time 1.0 t
c
Timer 1, 2, 3 Input High Time 1.0 t
c
Timer 1, 2, 3 Input Low Time 1.0 t
c
Reset Pulse Width 1.0 µs
Note 18: t
c
=
Instruction Cycle Time
Note 19: Maximum rate of voltage change must be
<
0.5 V/ms.
Note 20: Supply and IDLE currents are measured with CKI driven with a square wave Oscillator, CKO driven 180˚ out of phase with CKI, inputs connected to V
CC
and outputs driven low but not connected to a load.
Note 21: The HALTmode will stop CKI from oscillating in the RC and the Crystal configurations. Measurement of I
DD
HALTis done with device neither sourcing nor
sinking current; with L, C, G0, and G2–G5 programmed as low outputs and not driving a load; all outputs programmed low and not driving a load; all inputs tied to
V
CC
; clock monitor and comparator disabled. Parameter refers to HALT mode entered via setting bit 7 of the G Port data register. Part will pull up CKI during HALT
in crystal clock mode.
Note 22: Pins G6 and RESET are designed with a high voltage input network. These pins allow input voltages
>
VCCand the pins will have sink current to VCCwhen
biased at voltages>VCC(the pins do not have source current when biased at a voltage below VCC). The effective resistance to VCCis 750Ω (typical). These two
pins will not latch up. The voltage at the pins must be limited to
<
14V.WARNING: Voltages in excess of 14V will cause damage to the pins. This warning ex-
cludes ESD transients.
Note 23: The output propagation delay is referenced to the end of the instruction cycle where the output change occurs.
Note 24: Parameter characterized but not tested.
Analog Function Block AC and DC Characteristics
V
CC
=
5.0V, −40˚C ≤ T
A
≤ +85˚C
Parameter Conditions Min Typ Max Units
Input Offset Voltage 0.4V
<
V
IN
<
VCC− 1.5V
±
10
±
25 mV
Input Common Mode Voltage Range
(Note 26)
0.4 V
CC
− 1.5 V
V
CC
/2 Reference 4.0V<V
CC
<
6.0V 0.5 VCC− 0.04 0.5 V
CC
0.5 VCC+ 0.04 V
DC Supply Current for
V
CC
=
6.0V
250 µA
Comparator (when enabled)
DC Supply Current for
V
CC
=
6.0V
50 80 µA
V
CC
/2 Reference (when enabled)
DC Supply Current for
V
CC
=
6.0V
200 µA
Constant Current Source (when enabled)
Constant Current Source 4.0V
<
V
CC
<
6.0V 10 20 40 µA
Current Source Variation over 4.0V
<
V
CC
<
6.0V
±
2µA
Common Mode Range Temp=Constant
Current Source Enable Time 1.5 2 µs
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Analog Function Block AC and DC Characteristics (Continued)
V
CC
=
5.0V, −40˚C ≤ T
A
≤ +85˚C
Parameter Conditions Min Typ Max Units
Comparator Response Time 100 mV Overdrive, 1 µs
100 pF Load
Note 25: While performance characteristics are given at V
CC
=
5.0V, the analog function block will operate over the entire 2.5V–6.0V V
CC
range. Accuracy of the
V
CC
/2 reference and the constant current source is not guaranteed beyond the specified limits.
Note 26: The device is capable of operating over a common mode voltage range of 0 to V
CC
− 1.5V, however increased offset voltage will be observed between 0V
and 0.4V.
Typical Performance Characteristics (−55˚C ≤ T
A
=
+125˚C)
DS012094-18
FIGURE 3. MICROWIRE/PLUS Timing
DS012094-19 DS012094-20
DS012094-21 DS012094-22
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Typical Performance Characteristics (−55˚C ≤ T
A
=
+125˚C) (Continued)
DS012094-23
DS012094-24
DS012094-25 DS012094-26
DS012094-27 DS012094-28
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Typical Performance Characteristics (−55˚C ≤ T
A
=
+125˚C) (Continued)
Pin Descriptions
VCCand GND are the power supply pins. All VCCand GND
pins must be connected.
CKI is the clock input. This can come from an R/C generated
oscillator, or a crystal oscillator (in conjunction with CKO).
See Oscillator Description section.
RESET is the master reset input. See Reset Description section.
The device contains three bidirectional 8-bit I/O ports (C, G
and L), where each individual bit may be independently configured as an input (Schmitt Trigger inputs on ports L and G),
output or TRI-STATE under program control. Three data
memory address locations are allocated for each of these
I/O ports. Each I/O port has two associated 8-bit memory
mapped registers, the CONFIGURATION register and the
output DATA register.A memory mapped address is also reserved for the input pins of each I/O port. (See the memory
map for the various addresses associated with the I/O ports.)
Figure 4
shows the I/O port configurations. The DATA and
CONFIGURATION registers allow for each port bit to be individually configured under software control as shown below:
CONFIGURA-
TION
DATA
Port Set-Up
Register Register
0 0 Hi-Z Input
(TRI-STATE Output)
0 1 Input with Weak Pull-Up
1 0 Push-Pull Zero Output
1 1 Push-Pull One Output
PORT L is an 8-bit I/O port. All L-pins have Schmitt triggers
on the inputs.
The Port L supports Multi-Input Wake Up on all eight pins. L4
and L5 are used for the timer input functions T2A and T2B.
L6 and L7 are used for the timer input functions T3A and
T3B.
The Port L has the following alternate features:
L7 MIWU or T3B
L6 MIWU or T3A
L5 MIWU or T2B
L4 MIWU or T2A
L3 MIWU
L2 MIWU
L1 MIWU
L0 MIWU
Port G is an 8-bit port with 5 I/O pins (G0, G2–G5), an input
pin (G6), and a dedicated output pin (G7). Pins G0 and
G2–G6 all have Schmitt Triggers on their inputs. Pin G1
serves as the dedicated WDOUT WATCHDOG output, while
pin G7 is either input or output depending on the oscillator
mask option selected. With the crystal oscillator option selected, G7 serves as the dedicated output pin for the CKO
clock output. With the single-pin R/C oscillator mask option
selected, G7 serves as a general purpose input pin but is
also used to bring the device out of HALTmode with a low to
high transition on G7. There are two registers associated
with the G Port, a data register and a configuration register.
Therefore, each of the 5 I/O bits (G0, G2–G5) can be individually configured under software control.
Since G6 is an input only pin and G7 is the dedicated CKO
clock output pin (crystal clock option) or general purpose input (R/C clock option), the associated bits in the data and
configuration registers for G6 and G7 are used for special
purpose functions as outlined on the next page. Reading the
G6 and G7 data bits will return zeros.
DS012094-29
DS012094-30
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Pin Descriptions (Continued)
Note that the chip will be placed in the HALT mode by writing
a “1” to bit 7 of the Port G Data Register. Similarly the chip
will be placed in the IDLE mode by writing a “1” to bit 6 of the
Port G Data Register.
Writing a “1” to bit 6 of the Port G Configuration Register enables the MICROWIRE/PLUS to operate with the alternate
phase of the SK clock. The G7 configuration bit, if set high,
enables the clock start up delay after HALT when the R/C
clock configuration is used.
Config Reg. Data Reg.
G7 CLKDLY HALT
G6 Alternate SK IDLE
Port G has the following alternate features:
G6 SI (MICROWIRE Serial Data Input)
G5 SK (MICROWIRE Serial Clock)
G4 SO (MICROWIRE Serial Data Output)
G3 T1A (Timer T1 I/O)
G2 T1B (Timer T1 Capture Input)
G0 INTR (External Interrupt Input)
Port G has the following dedicated functions:
G7 CKO Oscillator dedicated output or general purpose
input
G1 WDOUT WATCHDOG and/or Clock Monitor dedi-
cated output
Port C is an 8-bit I/O port. The 40-pin device does not have
a full complement of Port C pins. The unavailable pins are
not terminated. A read operation for these unterminated pins
will return unpredicatable values.
PORTI is an eight-bit Hi-Z input port. The 28-pin device does
not have a full complement of Port I pins. The unavailable
pins are not terminated i.e., they are floating. A read operation for these unterminated pins will return unpredictable values. The user must ensure that the software takes this into
account by either masking or restricting the accesses to bit
operations. The unterminated Port I pins will draw power
only when addressed.
Port I is an eight-bit Hi-Z input port.
Port I0–I7 are used for the analog function block.
The Port I has the following alternate features:
I7 COMPOUT (Comparator Output)
I6 COMPIN5+ (Comparator Positive Input 5)
I5 COMPIN4+ (Comparator Positive Input 4)
I4 COMPIN3+ (Comparator Positive Input 3)
I3 COMPOUT/COMPIN2+ (Comparator Output/
Comparator Positive Input 2))
I2 COMPIN0+ (Comparator Positive Input 0)
I1 COMPIN− (Comparator Negative Input/Current
Source Out)
I0 COMPIN1+ (Comparator Positive Input 1)
Port D is an 8-bit output port that is preset high when RESET
goes low. The user can tie two or more D port outputs (except D2) together in order to get a higher drive.
Note: Care must be exercised with the D2 pin operation. At RESET, the ex-
ternal loads on this pin must ensure that the output voltages stay
above 0.8 V
CC
to prevent the chip from entering special modes. Also
keep the external loading on D2 to
<
1000 pF.
Functional Description
The architecture of the device is modified Harvard architecture. With the Harvard architecture, the control store program memory (ROM) is separated from the data store
memory (RAM). Both ROM and RAM have their own separate addressing space with separate address buses. The architecture, though based on Harvard architecture, permits
transfer of data from ROM to RAM.
CPU REGISTERS
The CPU can do an 8-bit addition, subtraction, logical or shift
operation in one instruction (t
c
) cycle time.
There are six CPU registers:
A is the 8-bit Accumulator Register
PC is the 15-bit Program Counter Register
PU is the upper 7 bits of the program counter (PC)
PL is the lower 8 bits of the program counter (PC)
B is an 8-bit RAM address pointer, which can be optionally
post auto incremented or decremented.
X is an 8-bit alternate RAM address pointer, which can be
optionally post auto incremented or decremented.
SP is the 8-bit stack pointer, which points to the subroutine/
interrupt stack (in RAM). The SP is initialized to RAM address 06F with reset.
DS012094-5
FIGURE 4. I/O Port Configurations
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