SH7763 Datasheet, PDF (1821/2026 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC Engine Family SH-4A Series

Section 40 General Purpose I/O (GPIO)
40.2.43 Pin Select Register 4 (PSEL4)
PSEL4 is a 16-bit readable/writable register that selects the functions of the Port I (PTI) and Port
O (PTO) pins multiplexed with “other function”, and also selects the function of the
IOIS16/TCLK pin and the REF125CK/HAC_BITCLK pin.
When using the pins with “other function” assigned, set PSEL4 and then set the corresponding
port control register to select “other function”.
Bit: 15 14 13 12 11 10 9
8
7
6
5
4
3
2
1
0
PTSEL4F PTSEL4E PTSEL4D — PTSEL4B PTSEL4[10:9] PTSEL48 — PTSEL46 PTSEL4[5:4]
PTSEL4[3:2]
PTSEL4[1:0]
Initial value: 0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
R/W: R/W R/W R/W R R/W R/W R/W R/W R R/W R/W R/W R/W R/W R/W R/W
Initial
Bit
Bit Name value R/W Description
15
PTSEL4F 0
R/W _{Selects the function of the IOIS16/TCLK pin.}
0: IOIS16 function is selected
1: TCLK function is selected
When the IOIS16 function is selected, this bit should be
set to the initial value.
Do not select the IOIS16 function after the TCLK function
is selected.
14
PTSEL4E 0
R/W Selects the function of the REF125CK/HAC_BITCLK pin.
0: REF125CK function is selected
1: HAC_BITCLK function is selected
13
PTSEL4D 0
R/W _{Selects the pin for DREQ1}
0: Input from PTL5 is used as DREQ1
1: Input from PTO5 is used as DREQ1
12

0
R
Reserved
This bit is always read as 0, and the write value should
always be 0.
Rev. 1.00 Oct. 01, 2007 Page 1755 of 1956
REJ09B0256-0100