SH7764 Datasheet, PDF (345/1752 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC Engine Family SH-4A Series

Initial
Bit
Bit Name Value R/W
8
IPUP
0
R/W
7 to 2 
All 0 R
1
ASYNC1 0
R/W
0
ASYNC0 0
R/W
Section 11 Memory Controller Unit (MCU)
Description
Input Pin Pull-Up Resistor Control
This bit specifies the state of the pull-up resistors on the
input pins (RDY and BREQ). This bit is initialized by a
power-on reset.
0: The pull-up resistors on the input pins (RDY and
BREQ) are on.
1: The pull-up resistors on the input pins (RDY and
BREQ) are off.
Reserved
These bits are always read as 0. The write value should
always be 0.
Asynchronous Input 1
This register enables asynchronous input to the BREQ
pin.
0: The BREQ input signal is synchronized with
CLKOUT.
1: The BREQ input signal is asynchronous to CLKOUT.
Asynchronous Input 0
This register enables asynchronous input to the RDY
pin.
0: The RDY input signal is synchronized with CLKOUT.
1: The RDY input signal is asynchronous to CLKOUT.
Rev. 1.00 Nov. 22, 2007 Page 289 of 1692
REJ09B0360-0100