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ML14469 View Datasheet(PDF) - LANSDALE Semiconductor Inc.

Part Name
Description
Manufacturer
ML14469
LANSDALE
LANSDALE Semiconductor Inc. LANSDALE
ML14469 Datasheet PDF : 10 Pages
1 2 3 4 5 6 7 8 9 10
ML14469
LANSDALE Semiconductor, Inc.
RECEIVE DATA (RI)
ADDRESS
ST
P SP
ML14469
PIN DESIGNATION
MC6850
PIN DESIGNATION
A0 A1 A2 A3 A4 A5 A6
D0 D1 D2 D3 D4 D5 D6
ADDRESS
IDENTIFIER
(HIGH LOGIC LEVEL)
COMMAND
ST
P SP
C0 C1 C2 C3 C4 C5 C6
D0 D1 D2 D3 D4 D5 D6
COMMAND
IDENTIFIER
(LOW LOGIC LEVEL)
TRANSMIT DATA (TRO)
INPUT DATA
STATUS
ST
P SP ST
P SP
ML14469
PIN DESIGNATION
MC6850
PIN DESIGNATION
ID0 ID1 ID2 ID3 ID4 ID5 ID6 ID7
D0 D1 D2 D3 D4 D5 D6 D7
S0 S1 S2 S3 S4 S5 S6 S7
D0 D1 D2 D3 D4 D5 D6 D7
ST = START BIT
P = PARITY BIT
SP = STOP BIT
A0 to A6 = ADDRESS BITS
C0 to C6 = COMMAND BITS
D0 to D7 = ACIA BUS BITS
ID0 to ID7 = ML14469 IDENTIFICATION CODE
S0 to S7 = ML14469 STATUS CODE
Figure 1. Data Format and Corresponding Data Position and Pins for MC14469 and MC6850
M
M
ADDRESS
S
BS
COMMAND
S
BS
S 0 1 2 3 4 5 6 7 PS0 1 2 3 4 5 6 7 P
TX X X X X X X P TX X X X X X X P
RECEIVER INPUT (RI)
VALID ADDRESS PULSE
(VAP)
INTERNAL VALID
ADDRESS LATCH
(VAL)
INTERNAL SEND
ENABLE LATCH
(SEL)
COMMAND STROBE
OUTPUT (CS)
SEND INPUT
(SEND)
TRANSMIT OUT
(TRO)
Page 4 of 10
M
M
S
S
BS
BS
S XX X XXX X X P P S XXX X XXX X P P
T01234567
ID
T0 1 2 3 4 5 6 7
STATUS
Figure 2. Typical Receive/Send Cycle
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