D6417729RHF200BV Renesas Electronics America, D6417729RHF200BV Datasheet - Page 351

• Manufacturer Part Number: D6417729RHF200BV
• Description: IC SUPER H MPU ROMLESS 208QFP
• Manufacturer: Renesas Electronics America
• Series: SuperH® SH7700r

Specifications of D6417729RHF200BV

• Core Processor: SH-3 DSP
• Core Size: 32-Bit
• Speed: 200MHz
• Connectivity: EBI/EMI, FIFO, IrDA, SCI, SmartCard
• Peripherals: DMA, POR, WDT
• Number Of I /o: 96
• Program Memory Type: ROMless
• Ram Size: 32K x 8
• Voltage - Supply (vcc/vdd): 1.85 V ~ 2.15 V
• Data Converters: A/D 8x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 208-QFP Exposed Pad, 208-eQFP, 208-HQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -

11.2.12 Cautions on Accessing Refresh Control Related Registers
RFCR, RTCSR, RTCNT, and RTCOR require that a specific code be appended to the data when it
is written to prevent data from being mistakenly overwritten by program overruns or other write
operations (figure 11.5). Perform reads and writes using the following methods:
1. When writing to RFCR, RTCSR, RTCNT, and RTCOR, use only word transfer instructions.
2. When reading from RFCR, RTCSR, RTCNT, and RTCOR, carry out reads with a 16-bit
RTCSR, RTCNT,
Byte transfer instructions cannot be used.
When writing to RTCNT, RTCSR, or RTCOR, place B'10100101 in the upper byte and the
write data in the lower byte. When writing to RFCR, place B'101001 in the upper 6 bits and
the write data in the remaining bits, as shown in figure 11.5.
width. 0 is read from undefined bits.
Initial value:
Initial value:
RTCOR
RFCR
R/W:
R/W:
Bit:
Bit:
Figure 11.5 Writing to RFCR, RTCSR, RTCNT, and RTCOR
15
15
1
1
R/W
15
—
0
7
0
0
0
1
1
R/W
14
—
0
6
0
0
0
0
0
R/W
13
—
0
5
0
1
10
1
9
0
R/W
12
—
0
4
0
1
8
7
R/W
11
—
0
3
0
Rev. 5.0, 09/03, page 303 of 806
Write data
Write data
R/W
10
—
0
2
0
R/W
R/W
9
0
1
0
R/W
R/W
8
0
0
0
0
0