HD6417641 RENESAS [Renesas Technology Corp], HD6417641 Datasheet - Page 199
HD6417641
Manufacturer Part Number
HD6417641
Description
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.HD6417641.pdf
(1036 pages)
- Current page: 199 of 1036
- Download datasheet (5Mb)
4.4
The CPG's control register is called the frequency control register (FRQCR). Refer the section 24,
List of Registers, for the addresses of the registers and the state of each register in each processor
state.
4.4.1
The frequency control register (FRQCR) is a 16-bit readable/writable register used to specify
whether a clock is output from the CKIO pin, the frequency multiplication ratio of PLL circuit 1,
and the frequency division ratio of the internal clock and the peripheral clock.
Only word access can be used on the FRQCR register.
This register is initialized (to H'1003) only in the case of a power-on reset. This register retains its
previous value after a manual reset or period in standby mode. The previous value is also retained
when an internal reset is triggered by an overflow of the WDT.
Bit
15 to 13
12
Register Descriptions
Frequency Control Register (FRQCR)
Bit Name
CKOEN
Initial
Value
All 0
1
R/W
R
R/W
Description
Reserved
These bits are always read as 0. The write value
should always be 0.
Clock Output Enable
CKOEN specifies whether a clock is output from the
CKIO and CKIO2 pins, or whether the CKIO and
CKIO2 pins is placed in the level-fixed state during
release of the standby mode (until the state enters
STATUS1 = L and STATUS0 = L from an interrupt). If
CKOEN is cleared to 0, the CKIO and CKIO2 pins are
fixed at low during STATUS1 = L and STATUS0 = H.
Therefore, the malfunction of an external circuit
because of an unstable CKIO clock during release of
the standby mode can be prevented. In clock
operating mode 7, the CKIO pin functions as an input
regardless of this bit value.
0: The CKIO pin is fixed to the low level in the standby
1: Clock is output from CKIO pin (placed in the high-
mode and while the system is leaving standby
mode.
impedance state during periods in standby mode).
Rev. 4.00 Sep. 14, 2005 Page 149 of 982
Section 4 Clock Pulse Generator (CPG)
REJ09B0023-0400
Related parts for HD6417641
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 32-Bit RISC Microcomputer Super RISC engine Family/SH7700 Series
Manufacturer:
RENESAS [Renesas Technology Corp]
Datasheet:
Part Number:
Description:
Renesas 16-Bit Single-Chip Microcomputer Renesas H8S Family/H8S/2100 Series
Manufacturer:
RENESAS [Renesas Technology Corp]
Datasheet:
Part Number:
Description:
Renesas MCU
Manufacturer:
RENESAS [Renesas Technology Corp]
Datasheet:
Part Number:
Description:
RENESAS MCU
Manufacturer:
RENESAS [Renesas Technology Corp]
Datasheet:
Part Number:
Description:
RENESAS MCU
Manufacturer:
RENESAS [Renesas Technology Corp]
Datasheet:
Part Number:
Description:
RENESAS MCU
Manufacturer:
RENESAS [Renesas Technology Corp]
Datasheet:
Part Number:
Description:
Renesas 16-Bit Single-Chip Microcomputer H8S Family / H8S/2200 Series
Manufacturer:
RENESAS [Renesas Technology Corp]
Datasheet:
Part Number:
Description:
Renesas 16-Bit Single-Chip Microcomputer H8S Family H8S-2300 Series
Manufacturer:
RENESAS [Renesas Technology Corp]
Datasheet:
Part Number:
Description:
Renesas 16-Bit Single-Chip Microcomputer H8S Family/H8S/2300 Series
Manufacturer:
RENESAS [Renesas Technology Corp]
Datasheet:
Part Number:
Description:
Renesas 16-Bit Single-Chip Microcomputer H8S Family/H8S/2300 Series
Manufacturer:
RENESAS [Renesas Technology Corp]
Datasheet:
Part Number:
Description:
Renesas 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Series
Manufacturer:
RENESAS [Renesas Technology Corp]
Datasheet:
Part Number:
Description:
Renesas 32-Bit Single-Chip RISC Microprocessor SuperH RISC engine Family/SH7040 Series(CPU Core SH-2)
Manufacturer:
RENESAS [Renesas Technology Corp]
Datasheet:
Part Number:
Description:
Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7700 Series
Manufacturer:
RENESAS [Renesas Technology Corp]
Datasheet:
Part Number:
Description:
Renesas 32-Bit RISC Microcomputer
Manufacturer:
RENESAS [Renesas Technology Corp]
Datasheet: