Datasheet S3C8837, S3C8835, S3P8837 Datasheet (Samsung)

S3C8835/C8837/P8837 PRODUCT OVERVIEW

1 PRODUCT OVERVIEW

SAM87 PRODUCT FAMILY

Samsung's SAM87 family of 8-bit single-chip CMOS microcontrollers offers a fast and efficient CPU, a wide
range of integrated peripherals, and various mask-programmable ROM sizes. Important CPU features include:

— Efficient register-oriented architecture
— Selectable CPU clock sources
— Release by interrupt of Idle and Stop power-down modes
— Built-in basic timer circuit with watchdog function

A sophisticated interrupt structure recognizes up to eight interrupt levels. Each level can have one or more
interrupt sources and vectors. Fast interrupt processing (within a minimum six CPU clocks) can be assigned to
specific interrupt levels.

S3C8835/C8837/P8837

The S3C8835 microcontroller has 16 K bytes of on-chip program memory and the S3C8837 has 24 K bytes. Both
chips have a 272-byte general-purpose internal register file. The interrupt structure has seven interrupt sources
with six interrupt vectors. The CPU recognizes six interrupt priority levels.

Using a modular design approach, the following peripherals were integrated with the SAM87 core to make the
S3C8835/C8837/P8837 suitable for use in color television and other types of screen display applications:

— Four programmable I/O ports (26 pins total: 16 general-purpose I/O pins; 8 n-channel, open-drain output pins)
— 2 channel A/D converter (4-bit resolution)
— 14-bit PWM output (one channels: push-pull type)
— Basic timer (BT) with watchdog timer function
— One 8-bit timer/counter (T0) with interval timer
— One 8-bit general-purpose timer/counter (TA) with prescalers
— On-screen display (OSD) with a wide range of programmable features including halftone control signal output

The S3C8835/C8837 are available in a versatile 42-pin SDIP package.

OTP

The S3C8835/C8837 microcontroller is also available in OTP (One Time Programmable) version, S3P8837.
S3P8837 microcontroller has an on-chip 24K-byte one-time-programmable EPROM instead of masked ROM.
The S3P8837 is comparable to S3C8835/C8837, both in function and in pin configuration.

1-1

PRODUCT OVERVIEW S3C8835/C8837/P8837

FEATURES

CPU

• SAM87 CPU core

Memory

• 16-K byte (S3C8835) or 24K- byte (S3C8837)
internal program memory

• 272-byte general-purpose register area

Instruction Set

• 78 instructions

• IDLE and STOP instructions added for power­down modes

Instruction Execution Time

• 750 ns (minimum) with an 8-MHz CPU clock

Interrupts

• 7 interrupt sources with 6 vectors

• 6 interrupt levels

• Fast interrupt processing for select levels

General I/O

Pulse Width Modulation Module

• 14-bit PWM with one-channel output (push-pull
type)

• PWM counter and data capture input pin

• Frequency: 5.859 kHz to 23.437 kHz with a
6-MHz CPU clock

On-Screen Display (OSD)

• Video RAM: 252 × 12 bits

• Character generator ROM: 256 × 18 × 16 bits
(256 display characters: fixed: 2, variable: 254)

• 252 display positions (12 rows × 21 columns)

• 16-dot × 18-dot character resolution

• 16 different character sizes

• Eight character colors

• Vertical direction fade-in/fade-out control

• Eight colors for character and frame background

• Halftone control signal output; selectable for
individual characters

• Synchronous polarity selector for H-sync and
V-sync input

• Four I/O ports (26 pins total)

• Six open-drain pins for up to 6-volt loads

• Two open-drain pins for up to 5-volt loads

8-Bit Basic Timer

• Three selectable internal clock frequencies

• Watchdog or oscillation stabilization function

Timer/Counters

• One 8-bit timer/counter (T0) with three internal
clocks and interval timer mode.

• One general-purpose 8-bit timer/counters with
interval timer mode (timer A)

A/D Converter

• Two analog input pins; 4-bit resolution

• 3.125 µs conversion time (8-MHz CPU clock)

Oscillator Frequency

• 5-MHz to 8-MHz external crystal oscillator

• Maximum 8-MHz CPU clock

Operating Temperature Range

• – 20°C to + 85°C

Operating Voltage Range

• 4.5 V to 5.5 V

Package Type

• 42-pin SDIP

1-2

S3C8835/C8837/P8837 PRODUCT OVERVIEW

BLOCK DIAGRAM

X

OSC

OSC

H-sync

V-sync

Vgreen

Vblue

Vblank

OSDHT

ADC0
ADC1

X

IN

OUT

IN

OUT

Vred

RESET

INT0 - INT1

MAIN

OSC

L-C OSC

ON-

SCREEN

DISPLAY

4-BIT

ADC

P0.0 - P0.7

PORT 0 PORT 1

SAM87 BUS

PORT I/O and INTERRUPT

CONTROL

SAM87 CPU

16KB ROM (8835)

24KB ROM (8837)

SAM87 BUS

P1.0 - P1.7

272-BYTE

REGISTER FILE

TEST

TIMER A

TIMER 0

PWM

BLOCK

PWM

COUNTER

and DATA

CAPTURE

14-BIT

PWM

CAPA

PWM0

PORT 2

P2.0 - P2.7

Figure 1-1. Block Diagram

PORT 3

P3.0 - P3.1

1-3

PRODUCT OVERVIEW S3C8835/C8837/P8837

PIN ASSIGNMENTS

P2.5/PWM0

P2.1

P2.2(

SCL

P2.3(

SDA

P2.4
P2.0
P2.6

P1.7
P3.0/ADC0
P3.1/ADC1

P0.6

P0.7

TEST

P1.0/INT0
P1.1/INT1

P1.2

P1.3

P1.4

P1.5

P1.6

P2.7/OSDHT

1
2

)

3

)

4
5
6
7
8
9
10
11
12
13

S3C8835
S3C8837

42-PIN SDIP

(Top View)

14
15
16
17
18
19
20
21

42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22

P0.0
P0.1
P0.2
P0.3
P0.4
V

SS2

CAPA
P0.5
V

DD

RESET

X

OUT

X

IN

V

SS1

OSC

OUT

OSC

IN

V-sync
H-sync
Vblank
Vred
Vgreen
Vblue

1-4

Figure 1-2. S3C8835/C8837/P8837 Pin Assignment Diagram

S3C8835/C8837/P8837 PRODUCT OVERVIEW

Table 1-1. S3C8835/C8837 Pin Descriptions

Pin Name Pin

Pin Description Circuit

Type

P0.0–P0.7 I/O General I/O port (8-bit), configurable for

digital input or push-pull output.

P1.0–P1.1 I/O General I/O port (2-bit), configurable for

digital input or n-channel open-drain output.
P1.0–P1.1 can withstand up to 6-volt loads.
Multiplexed for alternative use as external
interrupt inputs INT0–INT1.

P1.2–P1.5 General I/O port (4-bit), configurable for

digital input or n-channel open-drain output.
P1.2–P1.5 can withstand up to 6-volt loads.
High current port (10mA).

P1.6–P1.7 General I/O port (2-bit), configurable for

digital input or push-pull output.

P2.0–P2.4,
P2.6

I/O General I/O port (6-bit). I/O mode or

n-channel open-drain, push-pull output
mode is software configurable. Pins can
withstand up to 5-volt loads.
P2.2: OTP serial clock pin
P2.3: OTP serial data pin

P2.5, P2.7 General I/O port (2-bit). I/O mode or

n-channel open-drain, push-pull output
mode is software configurable. Pins can
withstand up to 5-volt loads.

Each pin has an alternative function.
P2.5: PWM0 (14-bit PWM output)
P2.7: OSDHT (Halftone signal output)

Type

Pin

Numbers

Share

Pins

3 11–12, 35,

38–42

7 14–15 INT0–INT1

5 16–19

3 20, 8

2 2–7

2 1, 21 PWM0

OSDHT

1-5

PRODUCT OVERVIEW S3C8835/C8837/P8837

Table 1-1. S3C8835/C8837 Pin Descriptions (Continued)

Pin Name Pin

Type

P3.0–P3.1 I/O General I/O port (2 bits), configurable for

digital input or n-channel open-drain output.

Pin Description Circuit

Type

6 9–10 ADC0

Pin

Numbers

Share

Pins

ADC1
P3.0–P3.1 can withstand up to 5-volt loads.
Multiplexed for alternative use as external
interrupt inputs ADC0–ADC1.

PWM0 O Output pin for 14-bit PWM0 circuit 2 1 P2.5
ADC0–ADC1 I Analog inputs for 4-bit A/D converter 6 9,10 P3.0–

P3.1

INT0–INT1 I External interrupt input pins 7 14,15 P1.0–

P1.1
OSDHT O Halftone control signal output for OSD 2 21 P2.7
Vblue, Vgreen

Vred, Vblank

O Digital blue, green, red, and video blank

signal outputs for OSD

4 22–25 –

H-sync I H-sync input for OSD 8 26 –
V-sync V-sync input for OSD 27
OSC

IN,

OSC

OUT

I, O L-C oscillator pins for OSD clock frequency

– 28,29 –

generation

TEST I

0 V: Normal operation mode

– 13 –

5 V: Factory test mode

12.5 V: OTP write mode

X

IN, XOUT

RESET

V

DD, VSS1, VSS2

I, O System clock pins – 31, 32 –

I System reset input pin 1 33 –

– Power supply pins – 13 –

CAPA I Input for capture A module 8 26 –

1-6

S3C8835/C8837/P8837 PRODUCT OVERVIEW

PIN CIRCUITS

V

DD

V

DD

DATA I/O

200 K

Ω

NOISE

FILTER

Figure 1-3. Pin Circuit Type 1 (RESETRESET)

V

DD

DATA

OPEN­DRAIN

OUTPUT

DISABLE

INPUT

V

SS

INPUTIN

V

SS

INPUT

Figure 1-5. Pin Circuit Type 3

(P0.0–P0.7, P1.6–P1.7)

V

DD

I/O

DATA I/O

V

SS

Figure 1-4. Pin Circuit Type 2

(P2.0–P2.7, PWM0, OSDHT)

Figure 1-6. Pin Circuit Type 4

(Vblue, Vgreen, Vred, Vblank)

1-7

PRODUCT OVERVIEW S3C8835/C8837/P8837

I/O

I/O

DATA

DATA

V

SS

V

SS

INPUT

INPUT

INT

NOISE FILTER

NOTE:

Circuit type 5 can withstand up to
6-volt loads.

Figure 1-7. Pin Circuit Type 5 (P1.2–P1.5)

I/O

DATA

V

SS

INPUT

A/D IN

NOTE:

Circuit type 7 can withstand up to
6-volt loads.

Figure 1-9. Pin Circuit Type 7

(P1.0–P1.1, INT0–INT1)

INPUT IN

NOISE

FILTER

1-8

NOTE:

Circuit type 6 can withstand up to
5-volt loads.

Figure 1-8. Pin Circuit Type 6

(P3.0–P3.1, ADC0–ADC1)

Figure 1-10. Pin Circuit Type 8

(V-Sync H-Sync, CAPA)

S3C8835/C8837/P8837 ELECTRICAL DATA

15 ELECTRICAL DATA

OVERVIEW

In this section, S3C8835/C8837 electrical characteristics are presented in tables and graphs. The information is
arranged in the following order:

— Absolute maximum ratings
— D.C. electrical characteristics
— I/O capacitance
— A.C. electrical characteristics
— Input timing measurement points for t

NF1

and t

NF2

— Data retention supply voltage in Stop mode
— Stop mode release timing when initiated by RESET

— Main oscillator and L-C oscillator frequency
— Clock timing measurement points for X

— Main oscillator clock stabilization time (tST)
— A/D converter electrical characteristics

— Characteristic curves

IN

15-1

ELECTRICAL DATA S3C8835/C8837/P8837

Table 15-1. Absolute Maximum Ratings

(TA = 25°C)

Parameter Symbol Conditions Rating Unit

Supply Voltage
Input Voltage

Output Voltage
Output Current

V

DD

I

V
V
V

I1
I2
O

OH

P1.0–P1.5 (open-drain) – 0.3 to + 7 V
All port pins except V

All output pins
One I/O pin active – 18 mA

– – 0.3 to + 6.0 V

I1

– 0.3 to VDD + 0.3
– 0.3 to VDD + 0.3

V

High

All I/O pins active – 60

Output Current

I

OL

One I/O pin active + 30 mA

Low

Total pin current for port 1 + 100
Total pin current for ports 0, 2, and 3 + 100

Operating

T

A

– – 20 to + 85

°

C

Temperature
Storage

T

STG

– – 65 to + 150

°

C

Temperature

Table 15-2. D.C. Electrical Characteristics

(T

= – 20°C to + 85°C, VDD = 4.5 V to 5.5 V)

A

Parameter Symbol Conditions Min Typ Max Unit

Input High

V

IH1

All input pins except V

IH2

0.8 V

DD

–

V

DD

Voltage

X

X

IN,

OUT

All input pins except V
X

X

IN,

OUT

IOH = – 500 µA
P0, P1.6–P1.7, P2

IL2

2.7 V
– –

V

– 0.8

DD

0.2 V

DD

1.0 V

– – V

Input Low Voltage

Output High
Voltage

V

IH2

V

IL1

V

IL2

V

OH

R, G, B, Vblank

Output Low
Voltage

V

OL1

V

OL2

IOL = 4 mA
P0, P1.6–P1.7

IOL = 10 mA

– – 0.4 V

– – 0.8

P1.2–P1.5

V

OL3

IOL = 2 mA

– – 0.4

P1.0–P1.1, P3.0–P3.1

V

OL4

IOL = 1 mA

– – 0.4 V

R, G, B, Vblank, P2

V

V

15-2

S3C8835/C8837/P8837 ELECTRICAL DATA

Table 15-2. D.C. Electrical Characteristics (Continued)

(TA = – 20°C to + 85°C, VDD = 4.5 V to 5.5 V)

Parameter Symbol Conditions Min Typ Max Unit

Input High
Leakage Current

Input Low
Leakage Current

Output High
Leakage Current

I

LIH1

I

LIH2

I

LIH3

I

LIL1

I

LIL2

I

LIL3

I

LOH1

I

LOH2

VIN = V

DD

All input pins except I
and I

LIH3

VIN = V
VIN = V
V

= 0 V

IN

OSC

DD,
DD, XIN,

IN,

X

OSC

OUT

All input pins except I
I

and RESET

LIL3,

V

= 0 V, OSC

IN

V

= 0 V, X

IN

V

= V

OUT

DD

IN,

IN,

X

OSC

OUT

All output pins except I
V

= 6 V

OUT

LIH2

LIL2,

OUT

LOH2

OUT

– – 3 µA

10

2.5 10 20
– – – 3 µA

– 10

– 2.5 – 10 – 20

– – 3 µA

10

P1.0–P1.5

Output Low
Leakage Current

Supply Current

(note)

I

LOL

I

DD1

V

= 0 V

OUT

All output pins
Normal mode;

V

= 4.5 V to 5.5 V

DD

– – – 3 µA

– 7 20 mA

8-MHz CPU clock

I

DD2

Idle mode;
V

= 4.5 V to 5.5 V

DD

2 10

8-MHz CPU clock

I

DD3

Stop mode;
V

= 4.5 V to 5.5 V

DD

1 10 µA

NOTE: Supply current does not include current drawn through internal pull-up resistors or external output current loads.

15-3

ELECTRICAL DATA S3C8835/C8837/P8837

Table 15-3. Input/Output Capacitance

(T

= – 20°C to + 85°C, V

A

DD

= 0 V)

Parameter Symbol Conditions Min Typ Max Unit

C

C

OUT

IN

f = 1 MHz; unmeasured pins

are connected to V

SS

– – 10 pF

Input
capacitance

Output
capacitance

I/O capacitance

C

IO

Table 15-4. A.C. Electrical Characteristics

(T

= – 20°C to + 85°C, V

A

= 4.5 V to 5.5 V)

DD

Parameter Symbol Conditions Min Typ Max Unit

V-sync Pulse

t

VW

– 4 – – µs

Width
H-sync Pulse

t

HW

– 3 – – µs

Width
Noise Filter

t

NF1

t

NF2

t

NF3

t

NF4

t

NF5

P1.0–P1.1, V-sync – 350 – ns

RESET

– 1000
Glitch filter (oscillator block) – 15
CAPA – 5 –

t

CAPA

H-sync – 650 – ns

NOTE: t

CAPA

= f

/128.

OSC

1t

CPU

t

NF1L

t

NF2

0.8 V

0.2 V

Figure 15-1. Input Timing Measurement Points for t

DD

DD

t

NF1H

NF1

and t

NF2

15-4

S3C8835/C8837/P8837 ELECTRICAL DATA

Table 15-5. Data Retention Supply Voltage in Stop Mode

(TA = – 20 °C to + 85 °C)

Parameter Symbol Conditions Min Typ Max Unit

Data Retention

V

DDDR

Stop mode 2 – 6 V

Supply Voltage
Data Retention

I

DDDR

Stop mode, V

DDDR

= 2.0 V

– – 5 µA

Supply Current

NOTES:

1. Supply current does not include current drawn through internal pull-up resistors or external output current loads.

2. During the oscillator stabilization wait time (t

~

~

~

~

V

DD

EXECUTION OF

STOP INSTRUCTION

RESET

), all CPU operations must be stopped.

WAIT

STOP MODE

DATA RETENTION MODE

V

DDDR

t

SREL

OSCILLATION
STABILIZATION
TIME

NORMAL
OPERATING
MODE

NOTE:

t

is the same as 4096 x 16 x 1 / f

WAIT

OSC

t

WAIT

Figure 15-2. Stop Mode Release Timing When Initiated by a Reset

15-5

ELECTRICAL DATA S3C8835/C8837/P8837

Table 15-6. Main Oscillator and L-C Oscillator Frequency

(TA = – 20°C to + 85°C, VDD = 4.5 V to 5.5 V)

Oscillator Clock Circuit Conditions Min Typ Max Unit

Crystal

C1

C2

X

X

IN

OSD block active 5 6 8 MHz

OUT

OSD block inactive 0.5 6 8

Ceramic

C1

C2

X

X

IN

OSD block active 5 6 8 MHz

OUT

OSD block inactive 0.5 6 8

External Clock

X

IN

OSD block active 5 6 8 MHz

X

OUT

OSD block inactive 0.5 6 8

L-C Oscillator

C1

C2

OSC

OSC

Recommend value:

IN

C1 = C2 = 20 pF

OUT

5 6.5 8 MHz

CPU Clock Frequency – 0.032 6.0 8 MHz

1 / f

OSC

t

XL

X

IN

t

XH

2.7 V

1.0 V

15-6

Figure 15-3. Clock Timing Measurement Points for X

IN

S3C8835/C8837/P8837 ELECTRICAL DATA

Table 15-7. Main Oscillator Clock Stabilization Time

(TA = – 20°C to + 85°C, VDD = 4.5 V to 5.5 V)

Oscillator Symbol Test Condition Min Typ Max Unit

Crystal –

VDD = 4.5 V to 6.0 V

– – 20 ms

Ceramic (Oscillation stabilization occurs when

10

VDD is equal to the minimum oscillator
voltage range.)

External Clock

Release Signal

t

SREL

XIN input High and Low level width
(t

XH, tXL

)

65 – 100 ns

Normal operation – 1000 – ns

Setup Time
Oscillation

Stabilization
Wait Time

(1)

t

WAIT

CPU clock = 8 MHz; Stop mode
released by RESET

CPU clock = 8 MHz; Stop mode

– 8.3 – ms

(2)

released by an interrupt

NOTES:

1. Oscillation stabilization time is the time required for the CPU clock to return to its normal oscillation frequency after a
power-on occurs, or when Stop mode is released.

2. The oscillation stabilization interval is determined by the basic timer (BT) input clock setting.

Table 15-8. A/D Converter Electrical Characteristics

(T

= – 20°C to + 85°C, VDD = 4.5 V to 5.5 V, VSS = 0 V)

A

Parameter Symbol Conditions Min Typ Max Unit

Absolute
Accuracy

(1)

Conversion

(2)

Time
Analog Input

– CPU clock = 8 MHz – –

t

CON

V

IAN

–

t

CPU

(3)

V

SS

× 25

± 0.5

LSB

– µs

–

V

DD

V

Voltage
Analog Input

R

AN

– 2 –

MΩ

Impedance

NOTES:

1. Excluding quantization error, absolute accuracy values are within ± 1/2 LSB.

2. 'Conversion time' is the time required from the moment a conversion operation starts until it ends.

3. The unit t

means one CPU clock period.

CPU

15-7

S3C8835/C8837/P8837 MECHANICAL DATA

16 MECHANICAL DATA

OVERVIEW

The S3C8835/C8837 microcontrollers are available in a 42-pin SIP package (42-SDIP-600).

14.00 ± 0.2

(1.77)

0.50 ± 0.1

42 22

42-SDIP-600

#1 21

39.10 ± 0.2

1.00 ± 0.1

1.778

15.24

0.51MIN 3.50 ± 0.2

3.30 ± 0.3 5.08MAX

+0.1

– 0.05

0.25

0 ~ 15 °

: Package dimensions are in millimeters.

NOTE

Figure 16-1. 42-Pin SDIP Package Mechanical Data (42-SDIP-600)

16-1

S3C8835/C8837/P8837 S3P8837 OTP

17 S3P8837 OTP

OVERVIEW

The S3P8837 single-chip CMOS microcontroller is the OTP (One Time Programmable) version of the

S3C8835/C8837 microcontroller. It has an on-chip OTP ROM instead of masked ROM. The EPROM is accessed
by serial data format.

The S3P8837 is fully compatible with the S3C8835/C8837, both in function and in pin configuration. Because of
its simple programming requirements, the S3P8837 is ideal for use as an evaluation chip for the
S3C8835/C8837.

17-1

S3P8837 OTP S3C8835/C8837/P8837

P2.7 /OSDHT

P0.7
P0.6
P0.5
P0.4
P0.3
P0.2
P0.1
P0.0

/VSS

VSS

/VDD

VDD

X

OUT

X

IN

P2.6

RESETRESET /RESET

P2.5/PWM0

P2.4

/P2.3

SDA

/P2.2

SCL

P2.1
P2.0

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21

S3P8837

42-PIN SDIP

(Top View)

42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22

OSC

OUT

OSC

IN

Vblank
Vblue
Vgreen
Vred
V-sync
H-sync
P1.0/INT0
P1.1/INT1
P1.2
P1.3
P1.4
P1.5
P1.6
TEST/

TEST

CAP.A
VSS/

VSS

P1.7
P3.0/ADC0
P3.1/ADC1

NOTE:

The bolds indicate an OTP pin name.

Figure 17-1. S3P8837 Pin Assignments (42-SDIP)

17-2

S3C8835/C8837/P8837 S3P8837 OTP

Table 17-1. Descriptions of Pins Used to Read/Write the EPROM

Main Chip During Programming

Pin Name Pin Name Pin No. I/O Function

P2.3 (Pin 4) SDAT 4 I/O Serial data Pin (Output when reading, Input

when writing) Input and Push-pull Output Port
can be assigned

P2.2 (Pin 3) SCLK 3 I/O Serial clock Pin (Input Only Pin)

V

TEST

PP

(TEST)

13 I 0 V: Operating mode

5 V: Test mode

12.5 V: OTP mode

RESET RESET

33 I 0 V: Chip initialization, OTP mode

5 V: Operating mode

VDD/V

SS

VDD/V

SS

34/30, 37 I Logic Power Supply Pin.

Table 17-2. Comparison of S3P8837 and S3C8835/C8837 Features

Characteristic S3P8837 S3C8835/C8837

Program Memory 24K-byte EPROM 24K-byte mask ROM
Operating Voltage (VDD)

4.5 V to 5.5 V 4.5 V to 5.5 V

OTP Programming Mode

VDD = 5 V, V

(TEST) = 12.5 V

PP

–

Pin Configuration 42-SDIP 42-SDIP
EPROM Programmability User Program 1 time Programmed at the factory

17-3