HD6417727F100C Renesas Electronics America, HD6417727F100C Datasheet - Page 373

• Manufacturer Part Number: HD6417727F100C
• Description: IC SUPERH MPU ROMLESS 240QFP
• Manufacturer: Renesas Electronics America
• Series: SuperH® SH7700r

Specifications of HD6417727F100C

• Core Processor: SH-3 DSP
• Core Size: 32-Bit
• Speed: 100MHz
• Connectivity: FIFO, SCI, SIO, SmartCard, USB
• Peripherals: DMA, LCD, POR, WDT
• Number Of I /o: 104
• Program Memory Type: ROMless
• Ram Size: 32K x 8
• Voltage - Supply (vcc/vdd): 1.6 V ~ 2.05 V
• Data Converters: A/D 6x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 240-QFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Program Memory Size: -

12.2.12 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 12.4). Perform reads and writes using the following methods:
1. Writing to RFCR, RTCSR, RTCNT, and RTCOR
2. Reading from RFCR, RTCSR, RTCNT, and RTCOR
RTCSR, RTCNT,
When writing to RFCR, RTCSR, RTCNT, and RTCOR, use only word transfer instructions.
You cannot write with byte transfer instructions.
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 top 6 bits and the
write data in the remaining bits, as shown in figure 12.4.
When reading from RFCR, RTCSR, RTCNT, and RTCOR, carry out reads with 16-bit width.
0 is read out from undefined bit sections.
RTCOR
RFCR
Figure 12.4 Writing to RFCR, RTCSR, RTCNT, and RTCOR
15
15
1
1
0
0
1
1
0
0
0
0
1
10
1
9
0
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Section 12 Bus State Controller (BSC)
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Write data
Write data
REJ09B0254-0600
0
0