r4f2456 Renesas Electronics Corporation., r4f2456 Datasheet - Page 213
r4f2456
Manufacturer Part Number
r4f2456
Description
16-bit Single-chip Microcomputer H8s Family / H8s/2400 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.R4F2456.pdf
(1376 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
r4f24565NVFQV
Manufacturer:
Renesas Electronics America
Quantity:
135
Company:
Part Number:
r4f24565NVFQV
Manufacturer:
Renesas Electronics America
Quantity:
10 000
Company:
Part Number:
r4f24568NVFQV
Manufacturer:
REA
Quantity:
15
Company:
Part Number:
r4f24568NVFQV
Manufacturer:
Renesas Electronics America
Quantity:
10 000
Company:
Part Number:
r4f24568NVRFQV
Manufacturer:
Renesas Electronics America
Quantity:
135
Company:
Part Number:
r4f24568NVRFQV
Manufacturer:
Renesas Electronics America
Quantity:
10 000
Company:
Part Number:
r4f24568NVZFQV
Manufacturer:
REA
Quantity:
5
Company:
Part Number:
r4f24568NVZFQV
Manufacturer:
Renesas Electronics America
Quantity:
10 000
Company:
Part Number:
r4f24569DVRFQV
Manufacturer:
Renesas Electronics America
Quantity:
135
Company:
Part Number:
r4f24569DVRFQV
Manufacturer:
Renesas Electronics America
Quantity:
10 000
Part Number:
r4f24569VFQV
Manufacturer:
RENESAS/瑞萨
Quantity:
20 000
- Current page: 213 of 1376
- Download datasheet (8Mb)
6.3.12
RTCNT is an 8-bit readable/writable up-counter. RTCNT counts up using the internal clock
selected by bits RTCK2 to RTCK0 in REFCR.
When RTCNT matches RTCOR (compare match), the CMF flag in REFCR is set to 1 and
RTCNT is cleared to H'00. If the RFSHE bit in REFCR is set to 1 at this time, a refresh cycle is
started. If the RFSHE bit is cleared to 0 and the CMIE bit in REFCR is set to 1, a compare match
interrupt (CMI) is generated.
RTCNT is initialized to H'00 by a reset and in hardware standby mode. It is not initialized in
software standby mode.
6.3.13
RTCOR is an 8-bit readable/writable register that sets the period for compare match operations
with RTCNT.
The values of RTCOR and RTCNT are constantly compared, and if they match, the CMF flag in
REFCR is set to 1 and RTCNT is cleared to H'00.
RTCOR is initialized to H'FF by a reset and in hardware standby mode. It is not initialized in
software standby mode.
Refresh Timer Counter (RTCNT)
Refresh Time Constant Register (RTCOR)
Rev. 1.00 Sep. 19, 2008 Page 183 of 1342
Section 6 Bus Controller (BSC)
REJ09B0467-0100
Related parts for r4f2456
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
Renesas Technology Corp [Renesas 32-Bit RISC Microcomputer Super RISC engine Family/SH7700 Series]
Manufacturer:
Renesas Electronics Corporation.
Datasheet:
Part Number:
Description:
RENESAS MCU M16C FAMILY / M16C/Tiny SERIES
Manufacturer:
Renesas Electronics Corporation.
Datasheet:
Part Number:
Description:
Renesas Starter Kit for RX210
Manufacturer:
Renesas Electronics Corporation.
Part Number:
Description:
EVALBOARD/Renesas StarterKit for RX630
Manufacturer:
Renesas Electronics Corporation.
Part Number:
Description:
EVALBOARD/Renesas Starter Kit+ for RX63N
Manufacturer:
Renesas Electronics Corporation.
Part Number:
Description:
EVALBOARD/Renesas Starter Kit
Manufacturer:
Renesas Electronics Corporation.
Part Number:
Description:
FLASH PROGRAMMER FOR RENESAS MICROCONTROLLERS
Manufacturer:
Renesas Electronics Corporation.
Part Number:
Description:
Manufacturer:
Renesas Electronics Corporation.
Datasheet:
Part Number:
Description:
Manufacturer:
Renesas Electronics Corporation.
Datasheet:
Part Number:
Description:
Manufacturer:
Renesas Electronics Corporation.
Datasheet:
Part Number:
Description:
Manufacturer:
Renesas Electronics Corporation.
Datasheet:
Part Number:
Description:
Manufacturer:
Renesas Electronics Corporation.
Datasheet:
Part Number:
Description:
Manufacturer:
Renesas Electronics Corporation.
Datasheet:
Part Number:
Description:
Manufacturer:
Renesas Electronics Corporation.
Datasheet:
Part Number:
Description:
Manufacturer:
Renesas Electronics Corporation.
Datasheet: