Samsung S3C72B5, S3C72B7, S3C72B9, S3P72B9 Datasheet
S3C72B5/C72B7/C72B9/P72B9 PRODUCT OVERVIEW
1PRODUCT OVERVIEW
OVERVIEW
The S3C72B5/C72B7/C72B9 single-chip CMOS microcontroller has been designed for high performance using
Samsung's newest 4-bit CPU core, SAM47 (Samsung Arrangeable Microcontrollers).
With an up-to-1280-dot LCD direct drive capability, segment expandable circuit, 8-bit and 16-bit timer/counter,
and serial I/O, the S3C72B5/C72B7/C72B9 offers an excellent design solution for a wide variety of applications
which require LCD functions.
Up to 51 pins of the 128-pin QFP package can be dedicated to I/O. Nine vectored interrupts provide fast
response to internal and external events. In addition, the S3C72B5/C72B7/C72B9's advanced CMOS technology
provides for low power consumption and a wide operating voltage range.
OTP
The S3C72B5/C72B7/C72B9 microcontroller is also available in OTP (One Time Programmable) version,
S3P72B9. S3P72B9 microcontroller has an on-chip 32-Kbyte one-time-programmable EPROM instead of
masked ROM. The S3P72B9 is comparable to S3C72B5/C72B7/C72B9, both in function and in pin configuration
except ROM size.
1-1
PRODUCT OVERVIEW S3C72B5/C72B7/C72B9/P72B9
FEATURES SUMMARY
Memory
• 3,584 × 4-bit RAM
(Excluding LCD Display
RAM)
• 16,384/24,576/32,768 ×
8-bit ROM
51 I/O Pins
• I/O: 47 pins (32 pins are
configurable as SEG pins)
• Input only: 4 pins
LCD Controller/Driver
• 80 SEG × 16 COM, 88 SEG
× 8 COM Terminals
• Internal resistor circuit for
LCD bias
• 16 Level LCD contrast
control (software)
• Segment expandable circuit
• All dot can be switched
on/off
8-bit Basic Timer
• 4 interval timer functions
• Watch-dog timer
16-Bit Timer/Counter
• Programmable 16-bit timer
• External event counter
• Arbitrary clock frequency
output
• External clock signal divider
• Configurable as two 8-bit
Timers
• Serial I/O interface clock
generator
Watch Timer
• Time interval generation:
0.5 s, 3.9 ms at 32,768 Hz
• 4 frequency outputs to BUZ
pin
• Clock source generation for
LCD
8-bit Serial I/O Interface
• 8-bit transmit/receive mode
• 8-bit receive mode
• LSB-first or MSB-first
transmission selectable
• Internal or external clock
source
Bit Sequential Carrier
• Supports 16-bit serial data
transfer in arbitrary format
Memory-Mapped I/O Structure
• Data memory bank 15
Power-Down Modes
• Idle mode (only CPU clock
stops)
• Stop mode (main system
clock stops)
• Subsystem clock stop mode
Oscillation Sources
• Crystal, Ceramic or RC for
main system clock
• Crystal oscillator for
subsystem clock
• Main system clock
frequency: 0.4–6 MHz
• Subsystem clock frequency:
32.768 kHz
• CPU clock divider circuit
(by 4, 8 or 64)
Instruction Execution Times
8-bit Timer/Counter
• Programmable 8-bit timer
• External event counter
• Arbitrary clock frequency
output
• External clock signal divider
1-2
Comparator
• 3 Channel mode: internal
reference (4-bit resolution)
• 2 Channel mode: external
reference
Interrupts
• Five internal vectored
interrupts
• Four external vectored
interrupts
• Two quasi-interrupts
• 0.67, 1.33, 10.7 µs at 6
MHz
• 0.95, 1.91, 15.3 µs at 4.19
MHz
• 122 µs at 32.768 kHz
Operating Temperature
• – 40 °C to 85 °C
Operating Voltage Range
• 1.8 V to 5.5 V
Package Type
• 128-pin QFP
S3C72B5/C72B7/C72B9/P72B9 PRODUCT OVERVIEW
FUNCTION OVERVIEW
SAM47 CPU
All KS57-series microcontrollers have the advanced SAM47 CPU core. The SAM47 CPU can directly address up
to 32 K bytes of program memory. The arithmetic logic unit (ALU) performs 4-bit addition, subtraction, logical,
and shift-and-rotate operations in one instruction cycle and most 8-bit arithmetic and logical operations in two
cycles.
CPU REGISTERS
Program Counter
A 15-bit program counter (PC) stores addresses for instruction fetches during program execution. Usually, the PC
is incremented by the number of bytes of the fetched instruction. The one instruction fetch that does not
increment the PC is the 1-byte REF instruction which references instructions stored in a look-up table in the
ROM. Whenever a reset operation or an interrupt occurs, bits PC13 through PC0 are set to the vector address.
Stack Pointer
An 8-bit stack pointer (SP) stores addresses for stack operations. The stack area is located in general-purpose
data memory bank 0. The SP is 8-bit read/writeable and SP bit 0 must always be logical zero.
During an interrupt or a subroutine call, the PC value and the PSW are written to the stack area. When the
service routine has completed, the values referenced by the stack pointer are restored. Then, the next instruction
is executed.
The stack pointer can access the stack despite data memory access enable flag status. Since the reset value of
the stack pointer is not defined in firmware, you use program code to initialize the stack pointer to 00H. This sets
the first register of the stack area to data memory location 0FFH.
PROGRAM MEMORY
In its standard configuration, the 16,384/24,576/32,768 × 8-bit ROM is divided into four areas:
— 16-byte area for vector addresses
— 96-byte instruction reference area
— 16-byte general-purpose area (0010–001FH)
— 16,256/24,448/32,640-byte area for general-purpose program memory
The vector address area is used mostly during reset operations and interrupts. These 16 bytes can alternately be
used as general-purpose ROM.
The REF instruction references 2 x 1-byte or 2-byte instructions stored in reference area locations 0020H–
007FH. REF can also reference three-byte instructions such as JP or CALL. So that a REF instruction can
reference these instructions, however, the JP or CALL must be shortened to a 2-byte format. To do this, JP or
CALL is written to the reference area with the format TJP or TCALL instead of the normal instruction name.
Unused locations in the REF instruction look-up area can be allocated to general-purpose use.
1-3
PRODUCT OVERVIEW S3C72B5/C72B7/C72B9/P72B9
DATA MEMORY
Overview
The 3,584-bit data memory has five areas:
— 32 × 4-bit working register area
— 224 × 4-bit general-purpose area in bank 0 which is also used as the stack area
— 256 × 4-bit general-purpose area in bank 1, bank 2,……, bank 13, respectively
— 256 × 5-bit area for LCD data in bank 14
— 128 × 4-bit area in bank 15 for memory-mapped I/O addresses
The data memory area is also organized as sixteen memory banks — bank 0, bank 1, ….., and bank 15. You use
the select memory bank instruction (SMB) to select one of the banks as working data memory.
Data stored in RAM locations are 1-, 4-, and 8-bit addressable. After a hardware reset, data memory initialization
values must be defined by program code.
Data Memory Addressing Modes
The enable memory bank (EMB) flag controls the addressing mode for data memory banks 0, 1, ….., or 15.
When the EMB flag is logical zero, only locations 00H–7FH of bank 0 and bank 15 can be accessed. When the
EMB flag is set to logical one, all sixteen data memory banks can be accessed based on the current SMB value.
Working Registers
The RAM's working register area in data memory bank 0 is also divided into four register banks. Each register
bank has eight 4-bit registers. Paired 4-bit registers are 8-bit addressable.
Register A can be used as a 4-bit accumulator and double register EA as an 8-bit extended accumulator; double
registers WX, WL and HL are used as address pointers for indirect addressing.
To limit the possibility of data corruption due to incorrect register addressing, it is advisable to use bank 0 for
main programs and banks 1, 2, and 3 for interrupt service routines.
LCD Data Register Area
Bit values for LCD segment data are stored in data memory bank 14. Register locations that are not used to store
LCD data can be assigned to general-purpose use.
Bit Sequential Carrier
The bit sequential carrier (BSC) is a 16-bit general register that you can manipulate using 1-, 4-, and 8-bit RAM
control instructions.
Using the BSC register, addresses and bit locations can be specified sequentially using 1-bit indirect addressing
instructions. In this way, a program can generate 16-bit data output by moving the bit location sequentially,
incrementing or decrementing the value of the L register. You can also use direct addressing to manipulate data
in the BSC.
1-4
S3C72B5/C72B7/C72B9/P72B9 PRODUCT OVERVIEW
CONTROL REGISTERS
Program Status Word
The 8-bit program status word (PSW) controls ALU operations and instruction execution sequencing. It is also
used to restore a program's execution environment when an interrupt has been serviced. Program instructions
can always address the PSW regardless of the current value of data memory access enable flags.
Before an interrupt is processed, the PSW is pushed onto the stack in data memory bank 0. When the routine is
completed, PSW values are restored.
IS1 IS0 EMB ERB
C SC2 SC1 SC0
Interrupt status flags (IS1, IS0), the enable memory bank and enable register bank flags (EMB, ERB), and the
carry flag (C) are 1- and 4-bit read/write or 8-bit read-only addressable. Skip condition flags (SC0–SC2) can be
addressed using 8-bit read instructions only.
Select Bank (SB) Register
Two 4-bit locations called the SB register store address values used to access specific memory and register
banks: the select memory bank register, SMB, and the select register bank register, SRB.
'SMB n' instructions select a data memory bank (0, 1, ….., or 15) and store the upper four bits of the 12-bit data
memory address in the SMB register. The 'SRB n' instruction is used to select register bank 0, 1, 2, or 3, and to
store the address data in the SRB.
The instructions 'PUSH SB' and 'POP SB' move SMB and SRB values to and from the stack for interrupts and
subroutines.
CLOCK CIRCUITS
Main system and subsystem oscillation circuits generate the internal clock signals for the CPU and peripheral
hardware. The main system clock can use a Crystal, Ceramic, or RC oscillation source, or an externallygenerated clock signal. The subsystem clock requires either a crystal oscillator or an external clock source.
Bit settings in the 4-bit power control and system clock mode registers select the oscillation source, the CPU
clock, and the clock used during power-down mode. The internal system clock signal (fxx) can be divided internally to produce four CPU clock frequencies — fx/4, fx/8, fx/64, or fxt/4.
INTERRUPTS
Interrupt requests may be generated internally by on-chip processes (INTB, INTT0, INTT1, and INTS) or
externally by peripheral devices (INT0, INT1, INT4, and INTK). There are two quasi-interrupts: INT2 and INTW.
INT2 detects rising or falling edges of incoming signals and INTW detects time intervals of 0.5 seconds or 3.91
milliseconds. The following components support interrupt processing:
— Interrupt enable flags
— Interrupt request flags
— Interrupt priority registers
— Power-down termination circuit
1-5
PRODUCT OVERVIEW S3C72B5/C72B7/C72B9/P72B9
POWER DOWN
To reduce power consumption, there are two power-down modes: idle and stop. The IDLE instruction initiates idle
mode and the STOP instruction initiates stop mode.
In idle mode, only the CPU clock stops while peripherals and the oscillation source continue to operate normally.
Stop mode effects only the main system clock — a subsystem clock, if used, continues oscillating. In stop mode,
main system clock oscillation stops completely, halting all operations except for a few basic peripheral functions.
RESET or an interrupt can be used to terminate either idle or stop mode.
RESETRESET
When a RESET signal occurs during normal operation or during power-down mode, the CPU enters idle mode
when the reset operation is initiated. When the standard oscillation stabilization interval (31.3 ms at 4.19 MHz)
has elapsed, normal CPU operation resumes.
I/O PORTS
The S3C72B5/C72B7/C72B9 has 13 I/O ports. Pin addresses for all I/O ports are mapped in bank 15 of the RAM.
There are 4 input pins and 47 configurable I/O pins for a total of 51 I/O pins. The contents of I/O port pin latches
can be read, written, or tested at the corresponding address using bit manipulation instructions.
TIMERS and TIMER/COUNTERS
The timer function has four main components: an 8-bit basic interval timer, an 8-bit timer/counter, a 16-bit
timer/counter and a watch timer. The 8-bit basic timer generates interrupt requests at precise intervals, based on
the selected clock frequency and has watch-dog timer function.
The programmable 8-bit and 16-bit timer/counters are used for external event counting, generation of arbitrary
clock frequencies for output, and dividing external clock signals. The 16-bit timer/counter is the source of the
clock signal that is required to drive the serial I/O interface and configurable as two 8-bit timer/counters.
The watch timer has an 8-bit watch timer mode register, a clock selector and a frequency divider circuit. Its
functions include real-time and watch-time measurement, clock generation for the LCD controller and frequency
outputs for buzzer sound.
LCD DRIVER/CONTROLLER
The S3C72B5/C72B7/C72B9 can directly drive an up-to-1,280-dot LCD panel. The LCD function block has the
following components:
— RAM area for storing display data
— 80 segment output pins (SEG0–SEG79)
— Segment expandable circuit
— 16 common output pins (COM0–COM15)
— 5 operating power supply pins (V
LC1–VLC5
)
— Sixteen level LCD contrast control circuit (software)
Frame frequency, LCD clock, duty, and segment pins used for display output are controlled by bit settings in the
8-bit mode register, LMOD. You use the 4-bit LCD control register, LCON, to turn the LCD display on and off,
and to control current supplied to the dividing resistors. Segment data are output using a direct memory access
method synchronized with the LCD frame frequency (f
LCD
).
Using the main system clock, the LCD panel operates in idle mode; during stop mode, it is turned off. If a
subsystem clock is used as a clock source, the LCD panel will continue to operate during stop and idle modes.
1-6
S3C72B5/C72B7/C72B9/P72B9 PRODUCT OVERVIEW
SERIAL I/O INTERFACE
The serial I/O interface supports the transmission or reception of 8-bit serial data with an external device. The
serial interface has the following functional components:
— 8-bit mode register
— Clock selector circuit
— 8-bit buffer register
— 3-bit serial clock counter
The serial I/O circuit can be set either to transmit-and-receive or to receive-only mode. MSB-first or LSB-first
transmission is also selectable. The serial interface operates with an internal or an external clock source, or using
the clock signal generated by the 16-bit timer/counter. To modify transmission frequency, the appropriate bits in
the serial I/O mode register (SMOD) must be manipulated.
COMPARATOR
Port 4 can be used as a analog input port for a comparator. The reference voltage for the 3-channel comparator
can be supplied either internally or externally at P4.2. The comparator module has the following components:
— Comparator
— Internal reference voltage generator (4-bit resolution)
— External reference voltage source at P4.2
— Comparator mode register (CMOD)
— Comparison result register (CMPREG)
1-7
PRODUCT OVERVIEW S3C72B5/C72B7/C72B9/P72B9
BLOCK DIAGRAM
/K0/P0.0
SCK
SO/K1/P0.1
SI/K2/P0.2
BUZ/K3/P0.3
INT0/P1.0
INT1/P1.1
INT2/P1.2
INT4/P1.3
M/P2.0
LCDFR/P2.1
CLO1/P2.2
CLO2/P2.3
TCLO0/CL/P3.0
TCLO1/P3.1
TCL0/P3.2
TCL1/P3.3
CIN0/P4.0
CIN1/P4.1
CIN2/P4.2
SEG79/K4/P6.0
SEG78/K5/P6.1
SEG77/K6/P6.2
SEG76/K7/P6.3
SEG75-SEG72/
P7.0-P7.3
SEG71-SEG68/
P8.0–P8.3
SEG67-SEG64/
P9.0–P9.3
SEG63-SEG60/
P10.0–P10.3
SEG59-SEG56/
P11.0–P11.3
SEG55-SEG52/
P12.0–P12.3
SEG51-SEG48/
P13.0–P13.3
I/O PORT 0
INPUT PORT 1
I/O PORT 2
I/O PORT 3
I/O PORT 4
I/O PORT 6
I/O PORT 7
I/O PORT 8
I/O PORT 9
I/O PORT 10
I/O PORT 11
I/O PORT 12
I/O PORT 13
RESET
INTERRUPT
CONTROL
BLOCK
INTERNAL
INTERRUPTS
INSTRUCTION DECODER
ARITHMETIC
LOGIC UNIT
XTin
AND
Xin
CLOCK
Xout
XTout
STACK
POINTER
PROGRAM
COUNTER
PROGRAM
STATUS
WORD
FLAGS
BAS IC
TIMER
WATCH
TIMER
LCD
DRIVER/
CONTROLLER
SEGMENT
EXPANDER
SERIAL I/O
8-BIT
TIMER/
COUNTER0
16-BIT
TIMER/
COUNTER1
COMPARATOR
WATCH-DOG
TIMER
VLC1-VLC5
COM0-COM7
COM8-COM15/
SEG87-SEG80
SEG0-SEG47
SEG48-SEG79/
PORT13-PORT6
M/P2.0
LCDFR/P2.1
CL/P3.0/TCLO0
P0.0 /
SCK
P0.1 / SO/K1
P0.2 / SI/K2
8-BIT TIMER/
COUNTER1A
8-BIT TIMER/
COUNTER1B
/K0
1-8
3,584 x 4-BIT
DATA
MEMORY
16/24/32 KBYTE
PROGRAM
MEMORY
Figure 1-1. S3C72B5/C72B7/C72B9 Simplified Block Diagram
S3C72B5/C72B7/C72B9/P72B9 PRODUCT OVERVIEW
PIN ASSIGNMENTS
SEG85/COM10
SEG84/COM11
SEG83/COM12
SEG82/COM13
SEG81/COM14
SEG80/COM15
SEG0
SEG1
SEG2
SEG3
SEG4
SEG5
SEG6
SEG7
SEG8
SEG9
SEG10
SEG11
SEG12
SEG13
SEG14
SEG15
SEG16
SEG17
SEG18
SEG19
128
127
126
125
124
123
122
121
120
119
118
117
116
115
114
113
112
111
110
109
108
107
106
105
104
61
62
63
103
102
101
100
99
98
97
96
95
94
93
92
91
90
89
88
87
86
85
84
83
82
81
80
79
78
77
76
75
74
73
72
71
70
69
68
67
66
65
64
SEG20
SEG21
SEG22
SEG23
SEG24
SEG25
SEG26
SEG27
SEG28
SEG29
SEG30
SEG31
SEG32
SEG33
SEG34
SEG35
SEG36
SEG37
SEG38
SEG39
SEG40
SEG41
SEG42
SEG43
SEG44
SEG45
SEG46
SEG47
SEG48/P13.3
SEG49/P13.2
SEG50/P13.1
SEG51/P13.0
SEG52/P12.3
SEG53/P12.2
SEG54/P12.1
SEG55/P12.0
SEG56/P11.3
SEG57/P11.2
COM9/SEG86
COM8/SEG87
COM7
COM6
COM5
COM4
COM3
COM2
COM1
COM0
VLC5
VLC4
VLC3
VLC2
VLC1
P0.0/SCK/K0
P0.1/SO/K1
P0.2/SI/K2
P0.3/BUZ/K3
VDD
VSS
X
OUT
XIN
TEST
XTIN
XT
OUT
RESET
P1.0/INT0
P1.1/INT1
P1.2/INT2
P1.3/INT4
P2.0/M
P2.1/LCDFR
P2.2/CLO1
P2.3/CLO2
P3.0/TCLO0/CL
P3.1/TCLO1
P3.2/TCL0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
S3C72B5/C72B7/C72B9
(128-QFP-1420)
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56 5758
59
60
P3.3/TCL1
P4.0/CIN0
P4.1/CIN1
P4.2/CIN2
SEG79/P6.0/K4
SEG75/P7.0
SEG74/P7.1
SEG73/P7.2
SEG78/P6.1/K5
SEG77/P6.2/K6
SEG76/P6.3/K7
SEG72/P7.3
SEG71/P8.0
SEG70/P8.1
SEG69/P8.2
SEG68/P8.3
SEG67/P9.0
SEG66/P9.1
SEG65/P9.2
SEG64/P9.3
SEG63/P10.0
SEG62/P10.1
SEG61/P10.2
SEG60/P10.3
SEG59/P11.0
SEG58/P11.1
Figure 1-2. S3C72B5/C72B7/C72B9 128-QFP Pin Assignment
1-9
PRODUCT OVERVIEW S3C72B5/C72B7/C72B9/P72B9
PIN DESCRIPTIONS
Table 1-1. S3C72B5/C72B7/C72B9 Pin Descriptions
Pin Name Pin Type Description Number Share Pin
P0.0
P0.1
P0.2
P0.3
P1.0
P1.1
P1.2
P1.3
P2.0
P2.1
P2.2
P2.3
P3.0
P3.1
P3.2
P3.3
P4.0
P4.1
P4.2
P6.0
P6.1
P6.2
P6.3
P7.0–P7.3
P8.0–P8.3
P9.0–P9.3
P10.0–P10.3
P11.0–P11.3
P12.0–P12.3
P13.0–P13.3
SCK
SO I/O Serial data output 17 P0.1
SI I/O Serial data input 18 P0.2
BUZ I/O 2, 4, 8, 16 kHz frequency output for buzzer sound 19 P0.3
K0–K3
K4–K7
I/O 4-bit I/O port.
1-bit and 4-bit read/write and test is possible.
4-bit unit pull-up resisters are assignable to input pins
by software and are automatically disabled for output
16
17
18
19
SCK/K0
SO/K1
SI/K2
BUZ/K3
pins. Each bit pin can be allocated as input or output
(1-bit unit). The N-ch open drain or push-pull output
may be selected by software (1-bit unit).
I 4-bit input port.
1-bit and 4-bit read and test is possible.
4-bit unit pull-up resistors are assignable to input pins
by software.
I/O 4-bit I/O port. 1-bit and 4-bit read/write and test is
possible. I/O function is same as port 0.
I/O 4-bit I/O port. 1-bit and 4-bit read/write and test is
possible. I/O function is same as port 0.
I/O 3-bit I/O port. I/O function is same as port 0 except
that port 4 is 3-bit I/O port.
I/O 4-bit I/O port. 1-, 4-bit and 8-bit read/write and test is
possible. 4-bit unit pull-up resisters are assignable to
input pins by software and are automatically disabled
for output pins. Each bit pin can be allocated as input
or output (1-bit unit). The N-ch open drain or push-
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47–50
INT0
INT1
INT2
INT4
M
LCDFR
CLO1
CLO2
TCLO0/CL
TCLO1
TCL0
TCL1
CIN0
CIN1
CIN2
K4/SEG79
K5/SEG78
K6/SEG77
K7/SEG76
SEG75–72
pull output may be selected by software (4-bit unit).
I/O 4-bit I/O port. 1-, 4-bit and 8-bit read/write and test is
possible. I/O function is same as port 6, 7.
I/O 4-bit I/O port. 1-, 4-bit and 8-bit read/write and test is
possible. I/O function is same as port 6, 7.
I/O 4-bit I/O port. 1-, 4-bit and 8-bit read/write and test is
possible. I/O function is same as port 6, 7.
51–54
55–58
59–62
63–66
67–70
71–74
SEG71–68
SEG67–64
SEG63–60
SEG59–56
SEG55–52
SEG51–48
I/O Serial I/O interface clock signal 16 P0.0
I/O External interrupts with rising/falling edge detection 16–19
43–46
P0.0–P0.3
P6.0–P6.3
1-10
S3C72B5/C72B7/C72B9/P72B9 PRODUCT OVERVIEW
Table 1-1. S3C72B5/C72B7/C72B9 Pin Descriptions (Continued)
Pin Name Pin Type Description Number Share Pin
INT0 I External interrupts with rising/falling edge detection 28 P1.0
INT1 I External interrupts with rising/falling edge detection 29 P1.1
INT2 I External quasi-interrupts with rising/falling edge
30 P1.2
detection
INT4 I External interrupts with rising/falling edge detection 31 P1.3
M I/O Alternated signal for SEG driver 32 P2.0
LCDFR I/O Synchronous frame signal for SEG driver 33 P2.1
CLO1 I/O Clock output or operating clock for SEG driver 34 P2.2
CLO2 I/O Clock output or operating clock for SEG driver 35 P2.3
CL I/O Data shift clock for SEG driver 36 P3.0
TCLO0 I/O Timer/counter0 clock output 36 P3.0
TCLO1 I/O Timer/counter1 clock output 37 P3.1
TCL0 I/O External clock input for timer/counter 0 38 P3.2
TCL1 I/O External clock input for timer/counter 1 39 P3.3
CIN0–CIN2 I/O CIN0,1: comparator input only
CIN2: comparator input or external reference input
40, 41
42
P4.0–P4.1
P4.2
SEG0–SEG47 O LCD segment data output 122–75 –
SEG48–
O LCD segment data output 74–43 Port13–6
SEG79
SEG80–
SEG87
O LCD segment data output 2,1,
128–123
COM15–8
COM0–COM7 O LCD common data output 10–3 –
COM8–COM15 O LCD common data output 123–128
SEG87–80
1, 2
V
LC1–VLC5
– LCD power supply. Voltage dividing resistors are
15–11 –
fixed.
V
DD
V
SS
X
in, Xout
– Main power supply 20 –
– Ground 21 –
– Crystal, Ceramic, or RC oscillator signal I/O for main
23, 22 –
system clock.
XT
in, XTout
– Crystal oscillator signal I/O for subsystem clock. 25, 26 –
TEST I Test signal input (must be connected to VSS) 24 –
RESET
NOTE: Pull-up resistors for all I/O ports are automatically disabled if they are configured to output mode.
I Reset signal 27 –
1-11
PRODUCT OVERVIEW S3C72B5/C72B7/C72B9/P72B9
Table 1-2. Overview of S3C72B5/C72B7/C72B9 Pin Data
Pin Names Share Pins I/O Type Reset Value Circuit Type
P0.0–P0.3
SCK, SO, SI, BUZ/K0–
I/O Input E-2
K3
P1.0–P1.3 INT0–INT2, INT4 I Input A-3
P2.0–P2.3 M, LCDFR, CLO1, CLO2 I/O Input E
P3.0–P3.1 TCLO0/CL, TCLO1 I/O Input E
P3.2–P3.3 TCL0, TCL1 I/O Input E-1
P4.0–P4.2 CIN0–CIN2 I/O Input F-4
P6.0–P6.3 K4–K7/SEG79–SEG76
I/O
Input
H-15
P7.0–P7.3 SEG75–SEG72 I/O Input H-8
P8.0–P8.3 SEG71–SEG68 I/O
Input
H-8
P9.0–P9.3 SEG67–SEG64 I/O Input H-8
P10.0–P10.3 SEG63–SEG60
I/O
Input
H-8
P11.0–P11.3 SEG59–SEG56 I/O Input H-8
P12.0–P12.3 SEG55–SEG52
I/O
Input
H-8
P13.0–P13.3 SEG51–SEG48 I/O Input H-8
COM0–COM7 – O Low output
H-4
COM8–COM15 SEG87–SEG80 O Low output H-6
SEG0–SEG47 – O Low output
V
LC1–VLC5
V
DD
V
SS
X
X
,
IN
OUT
XT
XT
,
IN
RESET
OUT
– – – –
– – – –
– – – –
– – – –
– – – –
– I – B
H-5
TEST – I – –
1-12
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