DF3048X16V Renesas Electronics America, DF3048X16V Datasheet - Page 189

• Manufacturer Part Number: DF3048X16V
• Description: MCU 5V 128K,PB-FREE 100-TQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8/300Hr

Specifications of DF3048X16V

• Core Processor: H8/300H
• Core Size: 16-Bit
• Speed: 16MHz
• Connectivity: SCI, SmartCard
• Peripherals: DMA, PWM, WDT
• Number Of I /o: 70
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: FLASH
• Ram Size: 4K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 8x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 100-TQFP, 100-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

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 H8/3048 Group 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 H8/3048 Group enters software standby mode. In either case, the normal
access state resumes on exit from software standby mode.
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 4—Strobe Mode Select (CAS/WE
valid when PSRAME = 0 and DRAME = 1. This bit is write-disabled when the PSRAME or
DRAME bit is set to 1.
Bit 7: SRFMD
0
1
Bit 6: PSRAME
0
1
Bit 4: CAS/WE
0
1
WE
WE
WE
Description
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
2WE mode
2CAS mode
WE): Selects 2CAS or 2WE mode. The setting of this bit is
WE
WE
Description
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
Rev. 7.00 Sep 21, 2005 page 163 of 878
Section 7 Refresh Controller
REJ09B0259-0700
(Initial value)
(Initial value)
(Initial value)