pc87591l National Semiconductor Corporation, pc87591l Datasheet - Page 245

• Manufacturer Part Number: pc87591l
• Description: Lpc Mobile Embedded Controllers
• Manufacturer: National Semiconductor Corporation

Revision 1.07
Embedded Controller Modules
HFCGM Low Value Register (HFCGML)
The HFCGML register contains the lower eight bits of the frequency multiplier M value. Data written to the register is stored
in the setup buffer. Reading the register returns the HFCGML value of the currently set frequency. On V
WATCHDOG reset and Debugger Interface reset, it is loaded with CF
Location: 00 FFA2
Type: R/W
HFCGM High Value Register (HFCGMH)
The HFCGMH register contains the upper bits of the frequency multiplier M value. Data written to the register is stored in
the setup buffer. Reading the register returns the HFCGMH value of the currently set frequency. On V
DOG reset and Debugger Interface reset, it is loaded with 03
Location: 00 FFA4
Type: R/W
HFCGN Value Register (HFCGN)
The HFCGN register is a byte-wide, read/write register containing five bits of the frequency multiplier N value. Data written to the
register is stored in the setup buffer. Reading the register returns the HFCGN value of the currently set frequency. On V
power-up, WATCHDOG reset and Debugger Interface reset, it is loaded with 08
Location: 00 FFA6
Type: R/W
Bit
Name
Reset
Bit
Name
Reset
Bit
Name
Reset
7-0
Bit
7-0
4-0
7-5
Bit
Bit
HFCGM7-0. Contains the lower eight bits of the M value.
HFCGM. Contains the upper bits of the M value.
HFCGN4-0. Contains the five bits of the N value.
Reserved.
16
16
16
7
1
7
0
7
0
Reserved
6
1
6
0
6
0
(Continued)
5
0
5
0
5
0
245
Description
Description
Description
4
0
16
4
0
4
0
HFCGM7-0
.
HFCGM
16
.
3
1
3
0
3
1
16
.
HFCGN4-0
0
2
1
2
2
0
CC
1
1
1
1
1
0
power-up, WATCH-
CC
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power-up,
0
1
0
1
0
0
CC