HD6417320 RENESAS [Renesas Technology Corp], HD6417320 Datasheet - Page 526
HD6417320
Manufacturer Part Number
HD6417320
Description
Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7700 Series
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.HD6417320.pdf
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Section 11
11.4.2
The USBH/USBF clock control register is an 8-bit readable/writable register. UCLKCR is
initialized to H'60 by a power-on reset. Word-size access is used to write to this register. This
writing should be performed with H'A5 in the upper byte and the write data in the lower byte.
Rev. 3.00 Jan. 18, 2008 Page 464 of 1458
REJ09B0033-0300
Bit
7
6
5
4
3 to 0
Bit Name
USSCS2
USSCS1
USSCS0
USSTB
USBH/USBF Clock Control Register (UCLKCR)
Clock Pulse Generator (CPG)
Initial
Value
0
1
1
0
All 0
R/W
R/W
R/W
R/W
R/W
R
Description
Source Clock Select
These bits select the source clock.
000: Clock stopped
001: Setting prohibited
010: Setting prohibited
011: Initial value
(To run the USBH/USB, however, change the setting to
"110: EXTAL_USB" or "111: USB crystal resonator".)
100: Setting prohibited
101: Setting prohibited
110: EXTAL_USB
111: USB crystal resonator
Standby USB Crystal
Specifies stop or operation of the USB crystal oscillator
in standby mode.
0: USB crystal oscillator stops in standby mode when the
1: USB crystal oscillator continues operating in standby
Reserved
These bits are always read as 0. The write value should
always be 0.
STBXTL bit (bit 4) in the STBCR register is 0.
mode
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