SH7055S Datasheet, PDF (887/1002 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH RISC engine Family/SH7000 Series

24.1.2 Pin Configuration
Pins related to power-down modes are shown in table 24.2.
Table 24.2 Pin Configuration
Pin Name
Hardware standby input pin
Abbreviation
HSTBY
Power-on reset input pin
RES
I/O
Input
Input
Function
Input level determines transition to
hardware standby mode
Power-on reset signal input pin
24.1.3 Related Registers
Table 24.3 shows the registers used for power-down state control.
Table 24.3 Related Registers
Name
Initial
Abbreviation R/W Value Write
Address
Read
Access
Size
Standby control register SBYCR^*1
R/W H'1F
H'FFFFEC14
8
System control register SYSCR^*1
R/W H'01*⁴
H'FFFFF708
8
Module standby control
register
MSTCR^*1
R/W H'01 H'FFFFF70A^*2 H'FFFFF70B^*3 8, 16
Notes: *1 SBYCR is accessed in three cycles, SYSCR and MSTCR in four or five cycles.
*2 Write data in word units. Data cannot be written in byte or longword units.
*3 Read data in byte units. Values cannot be read correctly if data is read in word or
longword units.
*4 The initial value of bit 7 in SYSCR is not defined.
Rev.2.0, 07/03, page 849 of 960