Fujitsu mb91192 Manuale Utente
262
CHAPTER 18 10-bit General-purpose Prescaler
18.1
Overview of 10-bit General-purpose Prescaler
The 10-bit general-purpose prescaler has built-in dedicated oscillation circuit and a load
function using the PPG output.
function using the PPG output.
■
Feature of 10-bit General-purpose Prescaler
•
10-bit prescaler x 1ch (with square wave and pulse output)
•
Dedicated internal oscillation circuit
•
Includes load function driven by PPG output
■
Block Diagram of 10-bit General-purpose Prescaler
Figure 18.1-1 Block Diagram of 10-bit General-purpose Prescaler
■
Register List of 10-bit General-purpose Prescaler
Figure 18.1-2 Register list of 10-bit General-purpose Prescaler
PCS0
PCS1
LDM
OM
INV
10bit Reload
Down Counter
Synchronous
Osci-
llation
Circuit
llation
Circuit
Reload Data Latch
Reload Data Register
GPRD
2
1
/fch
2
3
/fch
2
6
/fch
PCK/OSCI
OSCO
PO Output
GPRD
ST
Load
GPRC
(from FRC)
Internal Bus
Write STB
PPG-015
D
Q
M
P
X
X
M
P
X
X
M
P
X
X
15
8
7
0
bit
Address:
000030
H
000032
H
GPRC
GPRDH
GPRDL
Prescaler Control Register
Data Register