D6417729RHF200BV Renesas Electronics America, D6417729RHF200BV Datasheet - Page 350

• 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: -

11.2.10 Refresh Time Constant Register (RTCOR)
The refresh time constant register (RTCOR) is a 16-bit register with a readable/writable lower 8
bits. The values of RTCOR and RTCNT (lower 8 bits) are constantly compared. When the values
match, the compare match flag (CMF) in RTCSR is set and RTCNT is cleared to 0. When the
refresh bit (RFSH) in the individual memory control register (MCR) is set to 1 and the refresh
mode is set to auto refresh, a memory refresh cycle occurs when the CMF bit is set. RTCOR is
initialized to H'00 by a power-on reset. It is not initialized by a manual reset or in standby mode,
but holds its contents. Make the RTCOR setting before setting bits CKS2 to CKS0 in RTCSR.
Note: The method of writing to RTCOR differs from that for general registers to ensure that
11.2.11 Refresh Count Register (RFCR)
The refresh count register (RFCR) is a 16-bit register containing a readable/writable 10-bit counter
that increments every time RTCOR and RTCNT match. When RFCR exceeds the count limit
value set in the LMTS bit in RTCSR, the OVF bit in RTCSR is set and RFCR is cleared. RFCR is
initialized to H'0000 by a power-on reset. It is not initialized by a manual reset or in standby
mode, but holds its contents.
Note: The method of writing to RFCR differs from that for general registers to ensure that RFCR
Rev. 5.0, 09/03, page 302 of 806
Initial value:
Initial value:
RTCOR is not rewritten incorrectly. Use a word transfer instruction to set the upper byte
as B'10100101 and the lower byte as the write data. For details, see section 11.2.12,
Cautions on Accessing Refresh Control Related Registers.
is not rewritten incorrectly. Use a word transfer instruction to set the six bits starting from
the MSB in the upper byte as B'101001, and the remaining bits as the write data. For
details, see section 11.2.12, Cautions on Accessing Refresh Control Related Registers.
R/W:
R/W:
Bit:
Bit:
R/W
15
—
0
7
0
R/W
14
—
0
6
0
R/W
13
—
0
5
0
R/W
12
—
0
4
0
R/W
11
—
0
3
0
R/W
10
—
0
2
0
R/W
—
9
0
1
0
R/W
—
8
0
0
0