GMS81508A Datasheet, PDF (22/91 Pages) Hynix Semiconductor – USERS MANUAL

GMS81508/16
2.3.2. Prescaler
The prescaler consists of 11-bit binary counter, and input clock is supplied by oscillation circuit. The
frequency divided by prescaler is used as a source clock for peripherals.
fex
PS1 PS2 PS3 PS4 PS5 PS6 PS7 PS8 PS9 PS10 PS11
ENPCK
PS0 PS1 PS2 PS3 PS4 PS5 PS6 PS7 PS8 PS9 PS10 PS11
B.I.T.
8
Internal Data Bus
Peripherals
 Frequency-Divided Outputs of Prescaler

f_ex ( )
PS1 PS2 PS3 PS4 PS5 PS6 PS7 PS8 PS9 PS10 PS11
8


Interval 4
2
  Period 250 500
1

1








500
250
125
62.5 31.25 15.36 7.18 3.59
        2
4
8
16
32
64
128
256
The peripheral clock supplied from prescaler can be stopped by ENPCK. (However, PS11 cannot
be stopped by ENPCK)
CKCTLR
<00D3_H>
W
W
W
W
W
W
7
6
5
4
3
2
1
0

 WDTON ^ENPCK BTCL BTS2 BTS1 BTS0
Enable Peripheral Clock
0 : stop
1 : supply
17