R5F61668RN50FPV Renesas Electronics America, R5F61668RN50FPV Datasheet - Page 247

• Manufacturer Part Number: R5F61668RN50FPV
• Description: IC H8SX/1668 MCU FLASH 144LQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8SX/1600r

Specifications of R5F61668RN50FPV

• Core Processor: H8SX
• Core Size: 16/32-Bit
• Speed: 50MHz
• Connectivity: EBI/EMI, I²C, IrDA, SCI, SmartCard, USB
• Peripherals: DMA, LVD, POR, PWM, WDT
• Number Of I /o: 92
• Program Memory Size: 1MB (1M x 8)
• Program Memory Type: FLASH
• Ram Size: 56K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 8x10b; D/A 2x8b
• Oscillator Type: External
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 144-LQFP
• For Use With: R0K561668S000BE - KIT STARTER FOR H8SX/1668R0K561664S001BE - KIT STARTER FOR H8SX/1651HS0005KCU11H - EMULATOR E10A-USB H8S(X),SH2(A)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

9.2.14
DRACCR specifies the settings for the DRAM/SDRAM interface. Rewrite this register while the
DRAM/SDRAM is not accessed.
Bit
15, 14
13
12
11, 10
9
8
7 to 0
Bit
Bit Name
Initial Value
R/W
Bit
Bit Name
Initial Value
R/W
DRAM Access Control Register (DRACCR)
Bit Name

TPC1
TPC0

RCD1
RCD0

15


R
R
7
0
0
Initial
Value
All 0
0
0
All 0
0
0
All 0
14


R
R
0
6
0
R/W
R
R/W
R/W
R
R/W
R/W
R
TPC1
R/W
13

R
0
5
0
Description
Reserved
The initial value should not be changed.
Precharge Cycle Control
Select the number of RAS precharge cycles on a
normal access and a refresh cycle.
00: One cycle
01: Two cycles
10: Three cycles
11: Four cycles
Reserved
The initial value should not be changed.
RAS-CAS Wait Control
Select the number of wait cycles inserted between RAS
and CAS cycles.
00: No wait cycle inserted
01: One wait cycle inserted
10: Two wait cycles inserted
11: Three wait cycles inserted
Reserved
The initial value should not be changed.
TPC0
R/W
12

R
0
4
0
11


R
R
0
3
0
Rev. 2.00 Sep. 24, 2008 Page 213 of 1468
10


R
R
0
2
0
Section 9 Bus Controller (BSC)
RCD1
R/W

R
9
0
1
0
REJ09B0412-0200
RCD0
R/W

R
8
0
0
0