Rainbow Electronics AT89C5132 - Manual (Page 16)

16
AT8xC5132
4173A–8051–08/02
Table 17. PLLCON Register
PLLCON (S:E9h) – PLL Control Register
Reset Value = 0000 1000b
Table 18. PLLNDIV Register
PLLNDIV (S:EEh) – PLL N Divider Register
Reset Value = 0000 0000b
7 6 5 4 3 2 1 0
R1 R0 - - PLLRES - PLLEN PLOCK
Bit
Number
Bit
Mnemonic Description
7 - 6 R1:0
PLL Least Significant Bits R Divider
2 LSB of the 10-bit R divider.
5 - 4 -
Reserved
The values read from these Bits are always 0. Do not set these Bits.
3 PLLRES
PLL Reset Bit
Set this bit to reset the PLL.
Clear this bit to free the PLL and allow enabling.
2 -
Reserved
The values read from this bit is always 0. Do not set this bit.
1 PLLEN
PLL Enable Bit
Set to enable the PLL.
Clear to disable the PLL.
0 PLOCK
PLL Lock Indicator
Set by hardware when PLL is locked.
Clear by hardware when PLL is unlocked.
7 6 5 4 3 2 1 0
- N6 N5 N4 N3 N2 N1 N0
Bit
Number
Bit
Mnemonic Description
7 -
Reserved
The values read from this bit is always 0. Do not set this bit.
6 - 0 N6:0
PLL N Divider
7-bit N divider.