HD6433044 Hitachi Semiconductor, HD6433044 Datasheet - Page 800

• Manufacturer Part Number: HD6433044
• Description: (HD64 Series) Hitachi Single-Chip Microcomputer
• Manufacturer: Hitachi Semiconductor

RFSHCR—Refresh Control Register
Bit
Initial value
Read/Write
Self-refresh mode
0 DRAM or PSRAM self-refresh is disabled in software standby mode
1 DRAM or PSRAM self-refresh is enabled in software standby mode
SRFMD
R/W
7
0
PSRAM enable, DRAM enable
PSRAME DRAME
Bit 6
0
1
PSRAME
Strobe mode select
0 2
1 2
R/W
6
0
Address multiplex mode select
WE
CAS
0 8-bit column mode
1 9-bit column mode
Bit 5
0
1
0
1
DRAME
mode
R/W
mode
5
0
Refresh pin enable
0
1
RAM Interface
Can be used as an interval timer
(DRAM and PSRAM cannot be
directly connected)
DRAM can be directly connected
PSRAM can be directly connected
Illegal setting
Refresh signal output at the
Refresh signal output at the
CAS/
793
R/W
4
0
WE
Refresh cycle enable
0 Refresh cycles are disabled
1 Refresh cycles are enabled for area 3
M9/
R/W
3
0
M8
H'AC
RFSHE
R/W
2
0
RFSH
RFSH
Refresh controller
—
—
pin is disabled
pin is enabled
1
1
RCYCE
R/W
0
0