D6417729RHF200BV Renesas Electronics America, D6417729RHF200BV Datasheet - Page 349

• 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: -

Bit 0—Refresh Count Overflow Limit Select (LMTS): Indicates the count limit value to be
compared to the number of refreshes indicated in the refresh count register (RFCR). When the
value in RFCR overflows the value specified by LMTS, the OVF flag is set.
11.2.9
RTCNT is a 16-bit register containing a readable/writable 8-bit counter that counts up on an input
clock. The clock select bits (CKS2–CKS0) in RTCSR select the input clock. When RTCNT
matches RTCOR, the CMF bit in RTCSR is set and RTCNT is cleared. RTCNT is initialized to
H'00 by a power-on reset, but continues incrementing after a manual reset. It is not initialized in
standby mode, but holds its contents.
Note: The method of writing to RTCNT differs from that for general registers to ensure that
Bit 0: LMTS
0
1
Initial value:
Initial value:
RTCNT 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.
Refresh Timer Counter (RTCNT)
R/W:
R/W:
Bit:
Bit:
Description
Count limit value is 1024
Count limit value is 512
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
Rev. 5.0, 09/03, page 301 of 806
R/W
10
—
0
2
0
R/W
—
9
0
1
0
(Initial value)
R/W
—
8
0
0
0