IBM39STB032xx
IBM39STB034xx
STB032xx and STB034xx Digital Set-Top Box Integrated Controllers
Preliminary
General Purpose I/O (GPIO)
The following table describes the GPIO bits. For each GPIO bit only one signal can be selected at a time.
Each table row lists the signal associated with each logical GPIO bit number. The first column lists the
GPIO bit number. The second column lists the signal connected as input or output to the first alternate
GPIO multiplexer. The signal name is listed first, followed by the signal description. The third column
gives the direction of the signal listed in column 2. The same format is used for columns 4 through 7.
Blank entries indicate reserved GPIO multiplexing.
GPIO bit number refers to the device GPIO signal name, not the physical device pin number.
After reset all GPIOs are programmed as inputs, with the exception of GPIO0 bit 29 (PWM output),
which defaults to an open-drain output, and GPIO bit 14 (JTAG TDO output), which defaults to an output
(if BI_DATA[4] is set to ‘0’ during reset).
General Purpose I/O Bits
Bit #
00
Input/Output Mux 1
I2C1_SCL
Type
Input/Output Mux 2
Type
O
Input/Output Mux 3
DA_SURMOD0
Type
O
I/O DA_DEEMPHASIS0
I/O DA_DEEMPHASIS1
01
I2C1_SDA
O
DA_SURMOD1
O
AV_CSYNC
BI_CS4
GPT_FreqGenOut
DA_SURMOD0
INT4
I
O
O
I
02
03
O
O
SYS_CLK
BI_CS5
DA_SURMOD1
INT5
O
I
O
04
05
06
07
08
EDMAC0_REQ
EDMAC0_ACK
SCP_TXD
I
SD1_CS1
O
O
I
SERIAL0/16550_DTR
SERIAL0/16550_DSR
SERIAL0/16550_DCD
TS_BCLKEN
O
I
O
O
I
SD0_CS1
CI_PACKET_START
CI_DATA_ERROR
TS_REQ
I
SCP_RXD
SCP_CLK
I
I
O
O
O
SERIAL0/16550_RI
I
PWM0
GPT_COMP0
GPT_CAPT0
BI_CS6
I
O
09
10
O
O
PWM1
GPT_COMP1
GPT_CAPT1
BI_CS7
I
O
O
11
12
13
14
RW_TMS
RW_TDI
I
I
SSP_TXD
SSP_RXD
SSP_CLK
SSP_FS
O
I
BI_CS6
BI_CS7
INT6
O
O
I
RW_TCK
RW_TDO
RW_HALT
I
I
O
I/O INT7
I
SERIAL0/16550_CLK - External
SERIAL0/16550 Clock Input
SYS_CLK
15
I
I
O
16
17
DA_SERIAL_DATA1
DA_SERIAL_DATA2
O
O
BI_CS4
O
O
BI_CS5
HSP_ERROR
O
I
DV_TRANSPARENCY_
GATE
DV2_PIXEL_CLOCK
SERIAL1/INFRARED_CLK -
External SERIAL1/INFRARED
Clock Input
18
I/O
I
Pin and I/O Information
Page 30 of 55
STB03_sds_041800.fm.01
April 18, 2000
IBM [ IBM ]
