C8254 Datasheet, PDF (2/6 Pages) List of Unclassifed Manufacturers – PROGRAMMABLE TIMER /COUNTER MEGAFUNCTION

CAST C8254 Megafunction Datasheet
Pin Description
Name
DIN[7:0]
ADDR[1:0]
CSN
RDN
WRN
RESETN
CLK0
GATE0
CLK1
GATE1
CLK2
GATE2
OUT0
OUT1
OUT2
DOUT[7:0]
Type
In
In
In
In
In
In
In
In
In
In
In
In
Out
Out
Out
Out
Polarity
-
-
Low
Low
Low
Low
Falling
-
Falling
-
Falling
-
-
-
-
-
Description
Data Bus Input
Address
Chip Select
Read Control
Write Control
Reset internal Registers
Clock input of Counter 0
Gate input of Counter 0
Clock input of Counter 1
Gate input of Counter 1
Clock input of Counter 2
Gate input of Counter 2
Output of Counter 0
Output of Counter 1
Output of Counter 2
Data Bus Output
Block Diagram
DIN[7:0]
DOUT[7:0]
RDN
WRN
CSN
ADDR[1:0]
RESETN
Data
Bus
Buffer
Program
Read and
Write
Logic
Counter
Read/Write
Control
&
Control
Word
Register
Counter 0
CLK0
GATE0
OUT0
Counter 1
CLK1
GATE1
OUT1
Counter 2
CLK2
GATE2
OUT2
CAST, Inc.
Figure 1 – Block Diagram
Page 2