Siemens SAB80C537-M, SAB80C537-M-T40-85, SAB80C537-M16, SAB80C537-N, SAB80C517-16-N-T40-85 Datasheet

Microcomputer Components

8-Bit CMOS Single-Chip Microcontroller

SAB 80C517/80C537

Data Sheet 04.95

High-Performance SAB 80C517/80C537
8-Bit CMOS Single-Chip Microcontroller

Advanced Information

SAB 80C517 Microcontroller with factory mask-programmable ROM
SAB 80C537 Microcontroller for external ROM

● Versions for 12 MHz and 16 MHz ● Fast 32-bit division, 16-bit 2 multiplication,

operating frequency 32-bit normalize and shift by peripheral

● 8 K × 8 ROM (SAB 80C517 only) MUL/DIV unit (MDU)

● 256 × 8 on-chip RAM ● Eight data pointers for external memory

● Superset of SAB 80C51 architecture: addressing

1µs instruction cycle time at 12 MHz
750 ns instruction cycle time at 16 MHz levels selectable
256 directly addressable bits
Boolean processor inputs and programmable ref. voltages
64 Kbyte external data and program
memory addressing

● Four 16-bit timer/counters ● Extended power saving modes

● Powerful 16-bit compare/capture unit ● Nine ports: 56 I/O lines, 12 input lines

(CCU) with up to 21 high-speed or PWM
output channels and 5 capture inputs 0 to 70

● Versatile "fail-safe" provisions – 40 to 85

● Fourteen interrupt vectors, four priority

● 8-bit A/D converter with 12 multiplexed

● Two full duplex serial interfaces

● Fully upward compatible with SAB 80C515

● Two temperature ranges available:

o

C

o

C

● Plastic packages: P-LCC-84,

P-MQFP-100-2

SAB 80C517/80C537

Semiconductor Group 1 04.95

SAB 80C517/80C537

The SAB 80C517/80C537 is a high-end member of the Siemens SAB 8051 family of
microcontrollers. It is designed in Siemens ACMOS technology and based on the SAB 8051
architecture. ACMOS is a technology which combines high-speed and density characteristics
with low-power consumption or dissipation.

While maintaining all the SAB 80C515 features and operating characteristics the
SAB 80C517 is expanded in its arithmetic capabilities, "fail-safe" characteristics, analog signal
processing and timer capabilities. The SAB 80C537 is identical with the SAB 80C517 except
that it lacks the on-chip program memory. The SAB 80C517/SAB 80C537 is supplied in a
84 pin plastic leaded chip carrier package (P-LCC-84) and in a 100-pin plastic quad metric flat
package (P-MQFP-100-2).

Ordering Information
Type Ordering Code Package Description

8-bit CMOS Microcontroller

SAB 80C517-N Q67120-C397 P-LCC-84
SAB 80C517-M TBD P-MQFP-100-2
SAB 80C537-N Q67120-C452 P-LCC-84
SAB 80C537-M TBD P-MQFP-100-2
SAB 80C517-N-T40/85 Q67120-C483 P-LCC-84 with factory mask-programma­SAB 80C517-M-T40/85 TBD P-MQFP-100-2

SAB 80C537-N-T40/85 Q67120-C484 P-LCC-84
SAB 80C537-M-T40/85 TBD P-MQFP-100-2
SAB 80C517-N16 Q67120-C723 P-LCC-84 with mask-programmable
SAB 80C517-M16 TBD P-MQFP-100-2

SAB 80C537-N16 Q67120-C722 P-LCC-84
SAB 80C537-M16 TBD P-MQFP-100-2
SAB 80C517-N16-T40/85 Q67120-C724 P-LCC-84 with mask-programmable ROM,

with factory mask-programma­ble ROM, 12 MHz

for external memory, 12 MHz

ble ROM, 12 MHz,
ext. temperature – 40 to 85 °C

for external ROM, 12 MHz,
ext. temperature – 40 to 85 °C

ROM,16 MHz ext. temperature
– 40 to 110 °C

for external memory, 16 MHz

16 MHz
ext. temperature – 40 to 85 °C

SAB 80C517-16-N-T40/85 Q67120-C725 P-LCC-84 with factory mask-programma-

ble ROM, 12 MHz

Semiconductor Group 2

SAB 80C517/80C537

Logic Symbol

Semiconductor Group 3

SAB 80C517/80C537

Pin Configuration

(P-LCC-84)

Semiconductor Group 4

SAB 80C517/80C537

Pin Configuration

(P-MQFP-100-2)

Semiconductor Group 5

Pin Definitions and Functions
Symbol Pin Number

P-LCC-84 P-MQFP-100-2

I/O

*)

Function

SAB 80C517/80C537

P4.0 – P4.7 1– 3, 5 – 9 64 - 66,

68 - 72

I/O Port 4

is a bidirectional I/O port with internal
pull-up resistors. Port 4 pins that have
1 s written to them are pulled high by
the internal pull-up resistors, and in that
state can be used as inputs. As inputs,
port 4 pins being externally pulled low
will source current (I
characteristics) because of the internal
pull-up resistors.
This port also serves alternate compare
functions. The secondary functions are
assigned to the pins of port 4 as
follows:
– CM0 (P4.0): Compare Channel 0
– CM1 (P4.1): Compare Channel 1
– CM2 (P4.2): Compare Channel 2
– CM3 (P4.3): Compare Channel 3
– CM4 (P4.4): Compare Channel 4
– CM5 (P4.5): Compare Channel 5
– CM6 (P4.6): Compare Channel 6
– CM7 (P4.7): Compare Channel 7

in the DC

IL,

PE/SWD 4 67 I Power saving modes enable/

Start Watchdog Timer

A low level on this pin allows the
software to enter the power down, idle
and slow down mode. In case the low
level is also seen during reset, the
watchdog timer function is off on
default.
Use of the software controlled power
saving modes is blocked, when this pin
is held on high level. A high level during
reset performs an automatic start of the
watchdog timer immediately after reset.
When left unconnected this pin is pulled
high by a weak internal pull-up resistor.

*

I = Input
O = Output

Semiconductor Group 6

Pin Definitions and Functions (cont’d)
Symbol Pin Number

I/O

Function

*)

P-LCC-84 P-MQFP-100-2

RESET 10 73 I RESET

A low level on this pin for the duration of
one machine cycle while the oscillator is
running resets the SAB 80C517. A small
internal pull-up resistor permits
power-on reset using only a capacitor
connected to

SAB 80C517/80C537

V

.

SS

V

AREF

11 78 Reference voltage for the A/D con-

verter.

V

AGND

12 79 Reference ground for the A/D

converter.

P7.7 -P7.0 13 - 20 80 - 87 I Port 7

is an 8-bit unidirectional input port. Port
pins can be used for digital input, if
voltage levels meet the specified input
high/low voltages, and for the lower
8-bit of the multiplexed analog inputs of
the A/D converter, simultaneously.

*

I = Input
O = Output

Semiconductor Group 7

Pin Definitions and Functions (cont’d)
Symbol Pin Number

I/O

Function

*)

P-LCC-84 P-MQFP-100-2

P3.0 - P3.7 21 - 28 90 - 97 I/O Port 3

is a bidirectional I/O port with internal
pull-up resistors. Port 3 pins that have
1 s written to them are pulled high by
the internal pull-up resistors, and in that
state can be used as inputs. As inputs,
port 3 pins being externally pulled low
will source current (I
characteristics) because of the internal
pull-up resistors. Port 3 also contains
the interrupt, timer, serial port 0 and
external memory strobe pins that are
used by various options. The output
latch corresponding to a secondary
function must be programmed to a one
(1) for that function to operate.
The secondary functions are assigned
to the pins of port 3, as follows:

SAB 80C517/80C537

in the DC

IL,

*

I = Input
O = Output

–R× D0 (P3.0): receiver data input

(asynchronous) or data input/output
(synchronous) of serial interface

–T× D0 (P3.1): transmitter data

output (asynchronous) or clock
output (synchronous) of serial
interface 0

INT0 (P3.2): interrupt 0 input/timer 0

–

gate control

– INT1 (P3.3): interrupt 1 input/timer 1

gate control
– T0 (P3.4): counter 0 input
– T1 (P3.5): counter 1 input
–

WR (P3.6): the write control signal

latches the data byte from port 0 into

the external data memory

RD (P3.7): the read control signal

–

enables the external data

memory to port 0

Semiconductor Group 8

Pin Definitions and Functions (cont’d)
Symbol Pin Number

P-LCC-84 P-MQFP-100-2

I/O

*)

Function

SAB 80C517/80C537

P1.7 - P1.0 29 - 36 98 - 100,

1, 6 - 9

I/O Port 1

is a bidirectional I/O port with internal
pull-up resistors. Port 1 pins that have
1 s written to them are pulled high by
the internal pull-up resistors, and in that
state can be used as inputs. As inputs,
port 1 pins being externally pulled low
will source current (I
characteristics) because of the internal
pull-up resistors. It is used for the low
order address byte during program
verifi-cation. It also contains the
interrupt, timer, clock, capture and
compare pins that are used by various
options. The output latch must be
programmed to a one (1) for that
function to operate (except when used
for the compare functions).
The secondary functions are assigned
to the port 1 pins as follows:

INT3/CC0 (P1.0): interrupt 3 input/

–

compare 0 output / capture 0 input

– INT4/CC1 (P1.1): interrupt 4 input /

compare 1 output /capture 1 input

– INT5/CC2 (P1.2): interrupt 5 input /

compare 2 output /capture 2 input

– INT6/CC3 (P1.3): interrupt 6 input /

compare 3 output /capture 3 input

– INT2/CC4 (P1.4): interrupt 2 input /

compare 4 output /capture 4 input

– T2EX (P1.5): timer 2 external reload

trigger input

– CLKOUT (P1.6): system clock

output

– T2 (P1.7): counter 2 input

, in the DC

IL

*

I = Input
O = Output

Semiconductor Group 9

Pin Definitions and Functions (cont’d)
Symbol Pin Number

I/O

Function

*)

P-LCC-84 P-MQFP-100-2

XTAL2 39 12 – XTAL2

Input to the inverting oscillator amplifier
and input to the internal clock generator
circuits.

XT AL1 40 13 – XTAL1

Output of the inverting oscillator
amplifier. To drive the device from an
external clock source, XTAL2 should
be driven, while XTAL1 is left
unconnected. There are no
requirements on the duty cycle of the
external clock signal, since the input to
the internal clocking circuitry is devided
down by a divide-by-two flip-flop.
Minimum and maximum high and low
times as well as rise/fall times specified
in the AC characteristics must be
observed.

SAB 80C517/80C537

P2.0 - P2.7 41 - 48 14 - 21 I/O Port 2

is a bidirectional I/O port with internal
pull-up resistors. Port 2 pins that have
1 s written to them are pulled high by
the internal pull-up resistors, and in that
state can be used as in-puts. As inputs,
port 2 pins being externally pulled low
will source current (I
characteristics) because of the internal
pull-up resistors. Port 2 emits the high­order address byte during fetches from
external program memory and during
accesses to external data memory that
use 16-bit addresses (MOVX @DPTR).
In this application it uses strong
internal pull-up resistors when issuing
1 s. During accesses to external data
memory that use 8-bit addresses
(MOVX @Ri), port 2 issues the
contents of the P2 special function
register.

, in the DC

IL

*

I = Input
O = Output

Semiconductor Group 10

SAB 80C517/80C537

Pin Definitions and Functions (cont’d)

*)

Symbol Pin Number

I/O

P-LCC-84 P-MQFP-100-2

PSEN 49 22 O The Program Store Enable

ALE 50 23 O The Address Latch Enable

Function

output is a control signal that enables
the external program memory to the
bus during external fetch operations. It
is activated every six oscillator periodes
except during external data memory
accesses. Remains high during internal
pro-gram execution.

output is used for latching the address
into external memory during normal
operation. It is activated every six
oscillator periodes except during an
external data memory access

EA 51 24 I External Access Enable

When held at high level, instructions
are fetchedfrom the internal ROM
when the PC is less than 8192. When
held at low level, the SAB 80C517
fetches all instructions from external
program memory. For the SAB 80C537
this pin must be tied low

P0.0 - P0.7 52 - 59 26 - 27,

30 - 35

I/O Port 0

is an 8-bit open-drain bidirectional I/O
port. Port 0 pins that have 1 s written to
them float, and in that state can be
used as high-impedance inputs. Port 0
is also the multiplexed low-order
address and data bus during accesses
to external program or data memory. In
this application it uses strong internal
pull-up resistors when issuing 1 s.
Port 0 also outputs the code bytes
during program verification in the
SAB 83C517. External pull-up resistors
are required during program
verification.

*

I = Input
O = Output

Semiconductor Group 11

Pin Definitions and Functions (cont’d)
Symbol Pin Number

I/O

Function

*)

P-LCC-84 P-MQFP-100-2

P5.7 - P5.0 61 - 68 37 - 44 I/O Port 5

is a bidirectional I/O port with internal
pull-up resistors. Port 5 pins that have
1 s written to them are pulled high by
the internal pull-up resistors, and in that
state can be used as inputs. As inputs,
port 5 pins being externally pulled low
will source current (I
characteristics) because of the internal
pull-up resistors. This port also serves
the alternate function "Concurrent
Compare". The secondary functions
are assigned to the port 5 pins as
follows:
– CCM0 (P5.0): concurrent compare 0
– CCM1 (P5.1): concurrent compare 1
– CCM2 (P5.2): concurrent compare 2
– CCM3 (P5.3): concurrent compare 3
– CCM4(P5.4): concurrent compare 4
– CCM5 (P5.5): concurrent compare 5
– CCM6 (P5.6): concurrent compare 6
– CCM7(P5.7): concurrent compare 7

SAB 80C517/80C537

, in the DC

IL

OWE 69 45 I Oscillator Watchdog Enable

A high level on this pin enables the
oscillator watchdog. When left
unconnected this pin is pulled high by a
weak internal pull-up resistor. When
held at low level the oscillator watchdog
function is off.

*

I = Input
O = Output

Semiconductor Group 12

Pin Definitions and Functions (cont’d)
Symbol Pin Number

P-LCC-84 P-MQFP-100-2

I/O

*)

Function

SAB 80C517/80C537

P6.0 - P6.7 70 - 77 46 - 50,

54 - 56

I/O Port 6

is a bidirectional I/O port with internal
pull-up resistors. Port 6 pins that have
1 s written to them are pulled high by
the internal pull-up resistors, and in that
state can be used as inputs. As inputs,
port 6 pins being externally pulled low
will source current (I
DC characteristics) because of the
internal pull-up resistors. Port 6 also
contains the external A/D converter
control pin and the transmit and receive
pins for serial channel 1. The output
latch corresponding to a secondary
function must be programmed to a one
(1) for that function to operate.
The secondary functions are assigned
to the pins of port 6, as follows:

ADST (P6.0): external A/D converter

–

start pin

–R× D1 (P6.1): receiver data input of

serial interface 1

–T× D1 (P6.2): transmitter data output

of serial interface 1

, in the

IL

P8.0 - P8.3 78 - 81 57 - 60 I Port 8

is a 4-bit unidirectional input port. Port
pins can be used for digital input, if
voltage levels meet the specified input
high/low voltages, and for the higher
4-bit of the multiplexed analog inputs of
the A/D converter, simultaneously

*

I = Input
O = Output

Semiconductor Group 13

Pin Definitions and Functions (cont’d)
Symbol Pin Number

I/O

Function

*)

P-LCC-84 P-MQFP-100-2

RO 82 61 O Reset Output

This pin outputs the internally
synchronized reset request signal. This
signal may be generated by an external
hardware reset, a watchdog timer reset
or an oscillator watch-dog reset. The
reset output is active low.

SAB 80C517/80C537

V

SS

V

CC

37,60, 83 10, 62 – Circuit ground potential
38,84 11, 63 – Supply Terminal for all operating

N.C. – 2 - 5, 25,

28 - 29,
36,
51 - 53,
74 - 77;
88 - 89

*

I = Input
O = Output

modes

– Not connected

Semiconductor Group 14

SAB 80C517/80C537

Figure 1
Block Diagram

Semiconductor Group 15

SAB 80C517/80C537

Functional Description

The SAB 80C517 is based on 8051 architecture. It is a fully compatible member of the Siemens
SAB 8051/80C51 microcontroller family being a significantly enhanced SAB 80C515. The
SAB 80C517 is therefore 100 % compatible with code written for the SAB 80C515.

CPU

Having an 8-bit CPU with extensive facilities for bit-handling and binary BCD arithmetics the
SAB 80C517 is optimized for control applications. With a 12 MHz crystal, 58% of the
instructions execute in 1µs.

Being designed to close the performance gap to the 16-bit microcontroller world, the
SAB 80C517’s CPU is supported by a powerful 32-/16-bit arithmetic unit and a more flexible
addressing of external memory by eight 16-bit datapointers.

Memory Organisation

According to the SAB 8051 architecture, the SAB 80C517 has separate address spaces for
program and data memory. Figure 2 illustrates the mapping of address spaces.

Figure 2
Memory Mapping

Semiconductor Group 16

SAB 80C517/80C537

Program Memory

The SAB 80C517 has 8 KByte of on-chip ROM, while the SAB 80C537 has no internal ROM.
The program memory can externally be expanded up to 64 Kbyte. Pin
program fetches below address 2000

are done from internal or external memory.

H

Data Memory

The data memory space consists of an internal and an external memory space.

External Data Memory

Up to 64 KByte external data memory can be addressed by instructions that use 8-bit or 16-bit
indirect addressing. For 8-bit addressing MOVX instructions utilizing registers R0 and R1 can
be used. A 16-bit external memory addressing is supported by eight 16-bit datapointers.

Multiple Datapointers

EA controls whether

As a functional enhancement to standard 8051 controllers, the SAB 80C517 contains eight
16-bit datapointers. The instruction set uses just one of these datapointers at a time. The
selection of the actual datapointers is done in special function register DPSEL (data pointer
select, addr. 92

). Figure 3 illustrates the addressing mechanism.

H

Internal Data Memory

The internal data memory is divided into three physically distinct blocks:
– the lower 128 bytes of RAM including four banks of eight registers each

– the upper 128 byte of RAM
– the 128 byte special function register area.

A mapping of the internal data memory is also shown in figure 2. The overlapping address
spaces are accessed by different addressing modes. The stack can be located anywhere in the
internal data memory.

Semiconductor Group 17

SAB 80C517/80C537

Figure 3
Addressing of External Data Memory

Semiconductor Group 18