w65c51n Western Design Center, Inc., w65c51n Datasheet - Page 4

• Manufacturer Part Number: w65c51n
• Description: Asynchronous Communications Interface Adapter Acia
• Manufacturer: Western Design Center, Inc.

D0-D7
CS1B
RESB
IRQB
RWB
PHI2
CS0
RS0
RS1
RESB
DTRB
CS1B
RTSB
CTSB
XLT0
XTLI
VSS
CS0
RxC
RxD
RS0
RS1
TxD
Figure 1a 28 Pin PDIP Pin Out
1
2
3
4
5
6
7
8
9
10
11
12
13
14
INTERRUPT
LOGIC
TIMING &
CONTROL
DATA BUS
BUFFER
I/O
CONTROL
28
27
26
25
24
23
22
21
20
19
18
17
16
15
Figure 2 ACIA Internal Organization
N
T
E
R
N
A
D
A
T
A
B
U
S
L
I
RWB
PHI2
IRQB
D7
D6
D5
D4
D3
D2
D1
D0
DSRB
DCDB
VDD
STATUS
REGISTER
TRANSMITER
DATA
REGISTER
CONTROL
REGISTER
COMMAND
REGISTER
RECEIVER
DATA
REGISTER
DTRB
RTSB
CTSB
XTL0
XTLI
RxC
TxD
NC
Figure 1b 32 Pin LQFP Pin Out
1
2
3
4
5
6
7
8
W65C51N
BAUD RATE
GENERATOR
RECEIVE
SHIFT
REGISTER
RECEIVE
CONTROL
TRANSMIT
CONTROL
TRANSMIT
SHIFT
REGISTER
24
23
22
21
20
19
18
17
CTSB
TxD
DCDB
DSRB
RxC
XTLI
XTLO
DTRB
RTSB
RxD
NC
D7
D6
D5
D4
D3
D2
D1
4