HD6413003RVF RENESAS [Renesas Technology Corp], HD6413003RVF Datasheet - Page 157
HD6413003RVF
Manufacturer Part Number
HD6413003RVF
Description
microcontroller (MCU)
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.HD6413003RVF.pdf
(715 pages)
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Bit 7—Self-Refresh Mode (SRFMD): Specifies DRAM or pseudo-static RAM self-refresh
during software standby mode. When PSRAME = 1 and DRAME = 0, after the SRFMD bit is set
to 1, pseudo-static RAM can be self-refreshed when the H8/3003 enters software standby mode.
When PSRAME = 0 and DRAME = 1, after the SRFMD bit is set to 1, DRAM can be self-
refreshed when the H8/3003 enters software standby mode. In either case, the normal access state
resumes on exit from software standby mode.
Bit 7
SRFMD Description
0
1
Bit 6—PSRAM Enable (PSRAME) and Bit 5—DRAM Enable (DRAME): These bits enable
or disable connection of pseudo-static RAM and DRAM to area 3 of the external address space.
When DRAM or pseudo-static RAM is connected, the bus cycle and refresh cycle of area 3
consist of three states, regardless of the setting in the access state control register (ASTCR). If
AST3 = 0 in ASTCR, wait states cannot be inserted.
When the PSRAME or DRAME bit is set to 1, bits 0, 2, 3, and 4 in RFSHCR and registers
RTMCSR, RTCNT, and RTCOR are write-disabled, except that the CMF flag in RTMCSR can be
cleared by writing 0.
Bit 6
PSRAME
0
1
DRAM or PSRAM self-refresh is disabled in software standby mode
DRAM or PSRAM self-refresh is enabled in software standby mode
Bit 5
DRAME
0
1
0
1
Description
Can be used as an interval timer
DRAM can be connected
PSRAM can be connected
Illegal setting
139
(Initial value)
(Initial value)
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