R5F61668RN50FPV Renesas Electronics America, R5F61668RN50FPV Datasheet - Page 253

• 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: -

9.2.17
RTCNT counts up on the internal clock selected by bits RTCK2 to RTCK0 in REFCR.
When the RTCNT value matches the RTCOR value (compare match), the CMF flag in REFCR is
set to 1 and RTCNT is initialized to H'00. At this time, when the RFSHE bit in REFCR is set to 1,
a refresh cycle is generated. When the RFSHE bit is cleared to 0 and the CMIE bit in REFCR is
set to 1, a compare match interrupt (CMI) is generated.
9.2.18
RTCOR specifies intervals at which a compare match for RTCOR and RTCNT is generated.
The RTCOR value is always compared with the RTCNT value. When they match, the CMF flag
in REFCR is set to 1 and RTCNT is initialized to H'00.
Bit
Bit Name
Initial Value
R/W
Bit
Bit Name
Initial Value
R/W
Refresh Timer Counter (RTCNT)
Refresh Time Constant Register (RTCOR)
R/W
R/W
7
0
7
1
R/W
R/W
6
0
6
1
R/W
R/W
5
0
5
1
R/W
R/W
4
0
4
1
R/W
R/W
3
0
3
1
Rev. 2.00 Sep. 24, 2008 Page 219 of 1468
R/W
R/W
2
0
2
1
Section 9 Bus Controller (BSC)
R/W
R/W
1
0
1
1
REJ09B0412-0200
R/W
R/W
0
0
0
1