Block Diagram Of The Pwc Timer - Fujitsu MB90460 Series Hardware Manual

16.2

Block Diagram of the PWC Timer

Figure 16.2-1 PWC timer block diagram.
■ PWC Timer Block Diagram
PWC read
16
16
Data transfer
Overflow
Count start edge
Count end interrupt request
Overflow interrupt request
15
Figure 16.2-1 PWC Timer Block Diagram
Error
detection
PWC
16
Reload
16-bit up-count timer
Control circuit
Start edge
End edge
selection
selection
Count end
edge
Edge
detection
ERR
PWCS
ERR
Overflow
F.F.
16
Clock
Timer clear
Count
enabled
Divider ON/OFF
CKS1
CKS0
Division
rate
selection
2
DIVR
CHAPTER 16 PWC Timer
P07/PWO0
P23/PWO1
2
2 Clock Clock
divider
3
2
CKS1, CKS0,
Divider clear
Internal clock
(machine clock / 4)
8-bit
divider
P06/PWI0
P22/PWI1
435