DP8344BV National Semiconductor, DP8344BV Datasheet - Page 170

• Manufacturer Part Number: DP8344BV
• Description: IC BIPHASE COMM PROCESSR 84-PLCC
• Manufacturer: National Semiconductor

Specifications of DP8344BV

• Processor Type: 8-Bit RISC
• Speed: 20MHz
• Voltage: 4.5 ~ 5.5V
• Mounting Type: Surface Mount
• Package / Case: 84-PLCC
• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (max): 5.5V
• Operating Supply Voltage (min): 4.5V
• Mounting: Surface Mount
• Operating Temperature (max): 70C
• Operating Temperature (min): 0C
• Operating Temperature Classification: Commercial
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Features: -
• Lead Free Status / Rohs Status: Not Compliant
• Other names: *DP8344BV

6 0 Reference Section
RTR RECEIVE TRANSMIT REGISTER
RTF7–0
Alternate R4 read write
RTF7 RTF6 RTF5 RTF4 RTF3 RTF2 RTF1 RTF0
7
6
Receive Transmit FIFO’s
port to the least significant eight bits of receive
and transmit FIFO’s
on moves into RTR
0 are popped from receiver FIFO on moves
out of RTR
Transceiver
RTF7–0 are pushed onto the transmit FIFO
5
4
Further information Section 3 0
3
OWP
RF10–8 and RTF7–
(Continued)
2
TF10–8 and
Input output
1
0
170
TCR TRANSCEIVER COMMAND REGISTER
RLQ
SEC
SLR
ATA
OWP
TF10– 8
Alternate R6 read write
RLQ
7
SEC
6
Receive Line Quiesce
line quiesce bits the receiver looks for
Select Error Codes
switched into RTR location
Select Line Receiver
input source
Advance Transmitter Active
TX-ACT is advanced one half bit time so that
the transmitter can generate 5 5 line quiesce
pulses
Odd Word Parity
word parity
Transmit FIFO
moves into RTR
Further information Section 3 0 Transceiver
RTF7– 0 are pushed onto transmit FIFO on
SLR
5
SLR
OWP
RLQ
0
1
0
1
0
1
ATA
4
DATA-IN
On-chip analog
line receiver
Word Parity
Even
Odd
Number of
Quiesces
Source
OWP
3
2
3
OWP
When high ECR is
Controls transmitter
TF10
Selects the receiver
2
Selects number of
TF10– 8 and
TF9
When high
1
TF8
0