s3c2800 Samsung Semiconductor, Inc., s3c2800 Datasheet - Page 16

• Manufacturer Part Number: s3c2800
• Description: 32-bit Risc Microprocessor
• Manufacturer: Samsung Semiconductor, Inc.

S3C2800 MICROCONTROLLER
14
UART
RxD[1:0]
TxD[1:0]
nCTS[1:0]
nRTS[1:0]
IIC-BUS
IICSDA[1:0]
IICSCL[1:0]
Remote Control Signal Input Interrupt
IRIN
GENERAL-PURPOSE I/O PORTs
GPx[7:0] x 5
GPC[3:0]
RESET & CLOCK
nRESET
nRESET_OUT
XTAL0
EXTAL0
PLLCAP
XTAL1
EXTAL1
JTAG TEST LOGIC
nTRST
TMS
TCK
TDI
TDO
Signal
AO Crystal output for internal OSC circuit for system clock. It is the inverted output of
AO 32 KHz crystal output for RTC. It is the inverted output of XTAL1.
I/O
ST nRESET suspends any operation in progress and places S3C2800 into a known reset
IO
IO
IO
AI
AI
AI
O
O
O
O
I
I
I
I
I
I
I
UART receives data input.
UART transmits data output.
UART clear to send input signal.
UART request to send output signal.
Remote controller signal receive interrupt
General-purpose input/output ports
(GPA[7:0], GPB[7:0], GPC[3:0], GPD[7:0] , GPE[7:0], GPF[7:0])
state. For a reset, nRESET must be held to low level for at least 4 CPUCLK after the
processor power is stabilized.
The nRESET_OUT pin is asserted during hardware reset(POR,nRESET), software
reset and watchdog reset.
Crystal Input for internal OSC circuit for system clock.
If it isn't used, XTAL0 has to be high level.
XTAL0. If it isn't used, it has to be a floating pin.
Loop filter capacitor for system clocks PLL. (1uF )
32 KHz crystal input for RTC.
nTRST(TAP Controller Reset) resets the TAP controller at start.
If debugger is used, A 10K pull-up resistor has to be connected.
If debugger(black ICE) isn't used, nTRST pin has to be low level or low active pulse.
TMS (TAP Controller Mode Select) controls the sequence of the TAP controller's
states. A 10K pull-up resistor has to be connected to TMS pin.
TCK (TAP Controller Clock) provides the clock input for the JTAG logic.
A 10K pull-up resistor has to be connected to TCK pin.
TDI (TAP Controller Data Input) is the serial input for test instructions and data.
A 10K pull-up resistor has to be connected to TDI pin.
TDO (TAP Controller Data Output) is the serial output for test instructions and data.
Table 3. S3C2800 Signal Descriptions (Continued)
IIC-bus clock.
IIC-bus data.
Description
DATA SHEET