w83l950d Winbond Electronics Corp America, w83l950d Datasheet - Page 56

• Manufacturer Part Number: w83l950d
• Description: Peripheral Personal Computer Keyboard Controller
• Manufacturer: Winbond Electronics Corp America

(f(Xcin) in low-speed mode
GP55/CNTR1
Oscillator
F(Xin)
Oscillator
f(Xcin)
Direction register
Port GP55
Divider
1/16
CNTR1 active
Edge selection
bit
“0”
“1”
Pulse output mode
Timer Y count source
Selection bit
“1”
“0”
Pulse
measurement
mode
CNTR1 active
Edge selection
bit
Port GP55
latch
Event
Counter
mode
width
Fig.11.2 Timer Y Block Diagram
Timer mode
Pulse output mode
TIMER Y COUNT STOP BIT
“1”
“0”
Pre-scaler Y latch (8)
- 47 -
Pre-scaler Y (8)
Q
Q
Data bus
Toggle flip-flop
Publication Release Date: June 23, 2003
R
Timer Y latch (8)
T
W83L950D
Timer Y (8)
Revision 1.0
Timer Y latch write pulse
Pulse output mode
To timer Y interrupt
Request bit
To CNTR1 interrupt
Request bit