Sony CNU-500 Maintenance Manual page 46

IC
UPD71051GB-10-3B4 (NEC) FLAT
C-MOS SERIAL CONTROLLER
—TOP VIEW—
44 43 42 41 40 39 38 37 36 35 34
NC
NC
INDEX
1
NC
2
NC
3
4
5
6
NC NC
7
8
9
10
NC
11 NC
V
DD
NC (+5V)
12 13 14 15 16 17 18 19 20 21 22
PIN PIN
I/O SYMBOL I/O SYMBOL
No. No.
1 — NC 12 —
2 — NC 13 I RXCLK
3 TXDATA 14 — V
O
4 CK 15 I/O
I
5 RESET 16 I/O
I
6 NC 17 —
—
7 DSR 18 I/O
I
8 O RTS 19 I/O
9 O DTR 20 I RXDATA
10 NC 21 —
—
11 NC 22 —
—
CS ; CHIP SELECT INPUT
CTS ; CLEAR TO SEND OUTPUT
C/D ; CONTROL/DATA SELECT INPUT
D0-D7 ; DATA INPUTS/OUTPUTS
DSR ; DATA SET READY INPUT
DTR ; DATA TERMINAL READY OUTPUT
TXCLK ; TRANSMITTER CLOCK INPUT
TXDATA; TRANSMIT DATA OUTPUT
TXEMP ; TRANSMITTER EMPTY OUTPUT
STATUS
REGISTER
RECEIVE
DATA
BUFFER
D0-D7
TRANSMISSION
DATA
BUFFER
CONTROL
WORD
REGISTER
5
RESET
4
CK
36
CONTROLLER
C/D
37
RD
31
WR
35
CS
4-12
15
D0
NC
7
16
D1
DSR
33
NC 13
18
D2
AXCLK
20
19
32 D3
NC RXDATA
30
25
D4
TXCLK
31
42
26
D5
CTS
27
30
D6
29
D7
29
28 3
NC
TXDATA
4 40
27 TXRDY
ø
43
TXEMP
26
36
38
25
RXRDY
C/D
37
41
SYNC/BRK
24 RD
NC
31
WR
NC 23 8
RTS
GND NC
9
DTR
RESET CS
5 35
PIN PIN
I/O SYMBOL I/O SYMBOL
No. No.
23
NC — NC 34 — NC
24
— NC 35 I CS
25
(+5V) I/O D4 36 I C/D
DD
D0 26 I/O D5 37 I RD
D1 27 I/O D6 38 O RXRDY
IC 28 — NC 39 — NC
D2 29 I/O D7 40 O TXRDY
30
D3 I TXCLK 41 I/O SYNC/BRK
31
I WR 42 I CTS
32
GND — NC 43 O TXEMP
NC 33 — NC 44 — NC
TXRDY ; TRANSMIT READY OUTPUT
RD ; READ STROBE INPUT
RESET ; RESET INPUT
RTS ; REQUEST TO SEND OUTPUT
RXCLK ; RECEIVER CLOCK INPUT
RXDATA ; RECEIVE DATA INPUT
RXRDY ; RECEIVER READY OUTPUT
SYNC/BRK; SYNCHRONIZATION/BREAK INPUT/OUTPUT
WR ; WRITE STROBE INPUT
SYCHRONOUS
CHARACTER
REGISTER
3
40
TRANSMITTER
43
30
20
38
41
RECEIVER
13
42
8
MODEM
7
CONTROLLER
9
TXDATA
TXRDY
TXEMP
TXCLK
RXDATA
RXRDY
SYNC/BRK
RXCLK
CTS
RTS
DSR
DTR
CNU-500