scn2651 NXP Semiconductors, scn2651 Datasheet - Page 12

• Manufacturer Part Number: scn2651
• Description: Programmable Communications Interface Pci
• Manufacturer: NXP Semiconductors

Philips Semiconductors
TIMING DIAGRAMS (Continued)
1994 Apr 27
Programmable communications interface (PCI)
A = Start bit
B = Stop bit 1
C = Stop bit 2
D = TxD marking condition
TxEMT goes low at the beginning of the last data bit, or, if parity is enabled, at the beginning of the parity bit.
NOTES:
TxC (1X)
CE FOR
OF THR
CE FOR
OF THR
TxRDY
TxEMT
WRITE
TxRDY
TxEMT
WRITE
TxEN
TxEN
TxD
TxD
DATA 1
DATA 1
D
TxRDY, TxEMT (Shown for 5-bit characters, no parity, 2 stop bits [in asynchronous mode])
A
1
1
DATA 2
DATA 2
2
2
DATA 1
DATA 1
3
3
4
4
5
5
1
B
DATA 3
2
C
DATA 2
3
A
4
1
5
2
DATA 2
12
1
3
DATA 3
4
2
DATA 3
3
5
4
B
5
C
DATA 4
1
A
1
2
SYN 1
3
2
DATA 3
4
3
4
5
1
5
2
B
DATA 4
3
C
4
DATA 4
D
5
Product specification
SCN2651
A
1
DATA 4
SD00053
2