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STi5516
2.6.3. Pin Description (Continued)
Table 24: Port 4 PIO signal assignments
Port 4 bit
Input
Bit 0
TTXTREQUEST or OSDENABLE
Bit 1
CFC
Bit 2
YC[7]
Bit 3
ASC2_RXD
Bit 4
Bit 5
PWM_CAPTURE2 or YC[6]
Bit 6
SCCG_EXTCLK
Bit 7
a. OSDENABLE output function is selected rather than PIO by interconnect configuration
register CONFIG_CONTROL_C, bit 2 (CONFIG_OTHER_ALT_PIOPORT4[0]). The output
can then be turned off by the MPEG video decoder to use OSDENABLE as an input.
b. TXTDATAOUT function selected by interconnect configuration register
CONFIG_CONTROL_C, bit 3 (CONFIG_OTHER_ALT_PIOPORT4[1])
c. After reset, register CONFIG_CONTROL_C bit 4 must be set to 1 to pass PIO data or to use
ASC2_TXD in alternate output PIO mode.
Table 25: Port 5 PIO signal assignments
Port 5 bit
Input
Bit 0
IRB_IR_IN
Bit 1
IRB_UHF_IN
Bit 2
Bit 3
Bit 4
YC[5]
Bit 5
ASC3_RXD or YC[4]
Bit 6
NOT_ASC3_CTS or YC[3]
Bit 7
YC[2]
a. The wake-up from low power mode function is enabled by interconnect configuration register
CONFIG_CONTROL_D, bit 21 (RC_IRDA_DATA_IN_EN).
b. The wake-up from low power mode function is enabled by interconnect configuration register
CONFIG_CONTROL_D, bit 22 (UHF_IN_EN).
c. PIO needs to be configured as open drain in alternate output mode to use infrared transmitter/
receiver drive jack.
d. After reset, bit 5 in CONFIG_CONTROL_C must be set to 1 to pass PIO data or use infrared
transmitter/receiver drive jack in alternate function mode.
e. Output function selected by bit 11 in CONFIG_CONTROL_E
(CONFIG_OTHER_ALT_PIO_YC)
a
b
7368868E
Output
a
OSDENABLE
b
TXTDATAOUT
YC[7]
c
ASC2_TXD
YC[6]
PWM_COMPARE2
PWM_OUT2
Output
Infrared transmitter/receiver drive PPM
Infrared transmitter/receiver drive jack (0 or z)
open drain jack output
ASC3_TXD or YC[5]
YC[4]
YC[3]
NOT_ASC3RTS or YC[2]
97
STMicroelectronics Confidential
LC-26GA5E
LC-32GD9E
LC-32GA5E
LC-37GD9E
Pin list
c, d
e
e
39/709
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