Samsung S3C8847, S3C8849, S3P8849 Datasheet

S3C8847/C8849/P8849 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 of Idle and Stop power-down modes by interrupt
— 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 of six CPU clocks) can be assigned to
specific interrupt levels.

S3C8847/C8849/P8849 MICROCONTROLLERS

The S3C8847 microcontroller has a 24-Kbyte on-chip program memory and the S3C8849 has a 32-Kbyte. Both
chips have a 272-byte general-purpose internal register file. The interrupt structure has nine interrupt sources
with nine interrupt vectors. The CPU recognizes seven interrupt priority levels.

Using a modular design approach, the following peripherals were integrated with the SAM87 core to make the
S3C8847/C8849/P8849 microcontrollers 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; 10 n-channel, open-drain

output pins)
— 4-bit resolution A/D converter (4 channels)
— 14-bit PWM output (Two channels: push-pull type, open-drain type)
— Basic timer (BT) with watchdog timer function
— One 8-bit timer/counter (T0) with interval timer and PWM mode
— 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 S3C8847 and the S3C8849 are available in versatile 42-pin SDIP package.

OTP

The S3C8847/C8849 microcontrollers are also available in OTP (One Time Programmable) version, named the
S3P8849. The S3P8849 microcontroller has an on-chip 32-Kbyte one-time-programmable EPROM instead of a
masked ROM. The KS88P8432 is comparable to the S3C8847/C8849, both in function and pin configuration.

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PRODUCT OVERVIEW S3C8847/C8849/P8849

FEATURES

CPU

• SAM87 CPU core

Memory

• 24-Kbyte (S3C8847) or 32-Kbyte (S3C8849)
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

• 9 interrupt sources with 9 vectors

• 7 interrupt levels

• Fast interrupt processing for select levels

General I/O

• Four I/O ports (26 pins total)

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

• Four open-drain pins for up to 5 V loads

Pulse Width Modulation Module

• 14-bit PWM with two-channel output (push-pull
type, open-drain type)

• 8-bit PWM with four-channel, push-pull and open­drain

• 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 × 13-bits

• Character generator ROM: 384 × 18 × 16-bits
(384 display characters; fixed; 2, variable; 382)

• 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

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 or an external clock and interval timer
mode or PWM mode.

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

A/D Converter

• Four analog input pins; 4-bit resolution

• 3.125 µs conversion time (8 MHz CPU clock)

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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

S3C8847/C8849/P8849 PRODUCT OVERVIEW

BLOCK DIAGRAM

X

OSC

OSC

H-sync

V-sync

Vgreen

Vblue

Vblank

OSDHT

ADC0
ADC1
ADC2
ADC3

X

IN

OUT

IN

OUT

Vred

RESET

INT0 - INT3

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

24/32-KByte

ROM

SAM87 Bus

Port 2

P1.0 - P1.7

272-Byte Register

File

Port 3

Test

Timer A

Timer 0

PWM

Block

PWM

Counter

and Data

Capture

14-Bit

PWM

8-Bit

PWM

TO
T0CK

CAPA

PWM0
PWM1

PWM2
PWM3
PWM4
PWM5

P2.0 - P2.7

Figure 1-1. Block Diagram

P3.0 - P3.1

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PRODUCT OVERVIEW S3C8847/C8849/P8849

PIN ASSIGNMENTS

P2.5/PWM0
P2.1/PWM1
P2.2/PWM2
P2.3/PWM3
P2.4/PWM4
P2.0/PWM5

P2.6/T0

P1.7/T0CK
P3.0/ADC0
P3.1/ADC1
P0.6/ADC2
P0.7/ADC3

TEST
P1.0/INT0
P1.1/INT1
P1.2/INT2
P1.3/INT3

P1.4
P1.5
P1.6

P2.7/OSDHT

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

S3C8847/C8849

42-SDIP

(Top View)

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

Figure 1-2. S3C8847/C8849/P8849 Pin Assignment Diagram

P0.0
P0.1
P0.2
P0.3
P0.4
VSS2
CAPA
P0.5
VDD

RESET

XOUT
XIN
VSS1
OSCOUT
OSCIN
V-sync
H-sync
Vblank
Vred
Vgreen
Vblue

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S3C8847/C8849/P8849 PRODUCT OVERVIEW

PIN DESCRIPTIONS

Table 1-1. S3C8847/C8849/P8849 Pin Descriptions

Pin Name Pin

Pin Description Circuit

Type

P0.0–P0.3 I/O General I/O port (4-bit), configurable for

digital input or n-channel open-drain, push­pull output.
Pins can withstand up to 5 V loads.

P0.4–P0.5 General I/O port (2-bit), configurable for

digital input or push-pull output.

P0.6–P0.7 General I/O port (2-bit), configurable for

digital input or n-channel open-drain output.
P0.6–P0.7 can withstand up to 5 V loads.
Multiplexed for alternative use as external
inputs, ADC2–ADC3.

P1.0–P1.3 I/O General I/O port (4-bit), configurable for

digital input or n-channel open-drain output.
P1.0–P1.3 can withstand up to 6 V loads.
Multiplexed for alternative use as external
interrupt inputs, INT0–INT3.

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

digital input or n-channel open-drain output.
P1.4–P1.5 can withstand up to 6 V loads.
High current port(10mA)

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

digital input or push-pull output.
Each pin has an alternative function.
P1.7: T0CK (Timer 0 clock input)

P2.0–P2.7 I/O General I/O port (8-bit). Input/output mode

or n-channel open-drain, push-pull output
mode are software configurable. Pins can
withstand up to 5 V loads.
Each pin has an alternative function.
P2.0: PWM5 (8-bit PWM output)
P2.1: PWM1 (14-bit PWM output)
P2.2: PWM2 (8-bit PWM output)
P2.3: PWM3 (8-bit PWM output)
P2.4: PWM4 (8-bit PWM output)
P2.5: PWM0 (14-bit PWM output)
P2.6: T0 (Timer 0 PWM and interval output)
P2.7: OSDHT (Halftone signal output)

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

digital input or n-channel open-drain output.
P3.0–P3.1 can withstand up to 5 V loads.
Multiplexed for alternative use as external
inputs ADC0–ADC1.

Type

Numbers

2 39–42

3 38, 35

6 11–12

7 14–17

5 18–19

3 20, 8

2 1–7, 21

6 9–10

Pin

Share

Pins

(see pin

description)

ADC2–ADC3

INT0–INT3

T0CK

PWM0–

PWM5

T0, OSDHT

ADC0–ADC1

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PRODUCT OVERVIEW S3C8847/C8849/P8849

Table 1-1. S3C8847/C8849/P8849 Pin Descriptions (Continued)

Pin Name Pin

PWM0–

Type

O Output pin for 14-bit PWM circuit 2 1, 2 P2.5, P2.1

Pin Description Circuit

Type

Pin

Numbers

Share

Pins

PWM1
PWM2–

PWM5

O Output pin for 8-bit PWM circuit 2 3–6 P2.2–P2.4,

P2.0

ADC0–ADC3 I Analog inputs for 4-bit A/D converter 6 9–12 P3.0–P3.1,

P0.6–P0.7
INT0–INT3 I External interrupt input pins 7 14–17 P1.0–P1.3
T0 O Timer 0 output (interval, PWM) 2 7 P2.6
T0CK I Timer 0 clock input 3 8 P1.7
OSDHT O Halftone control signal output for OSD 2 21 P2.7
Vblue, Vgreen

Vred, Vblank
H-sync,

O Digital blue, green, red, and video blank

4 22–25 –

signal outputs for OSD

I H-sync, V-sync input for OSD 1 26, 27 –

V-sync
OSCIN,

OSC

OUT

XIN, X

OUT

RESET

TEST –

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

– 28, 29 –

generation

I, O System clock pins – 31, 32 –

I System reset input pin 8 33 –

Test Pin (must be connected to VSS).

– 13 –

Factory test mode is activated when 12V is
applied.

VDD, V
V

SS2

SS1,

– Power supply pins – 34, 30, 37 –

CAPA I Input for capture A module 1 36 –

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