IMP16C552-CJ68 IMP Inc, IMP16C552-CJ68 Datasheet - Page 11

• Manufacturer Part Number: IMP16C552-CJ68
• Description: Dual Universal Asynchronous Receiver/Transmitter (UART) with 16-BYTE FIFO & Parallel Printer Port
• Manufacturer: IMP Inc

11
Table II Accessible IM16c552 Registers for each serial channel
(*) These bits are read 0 in Character Mode of IMP16C552
Bit
no
0
1
2
3
4
5
6
7
4
MODEM
Control
Register
MCR
Data
Terminal
Read
(RTS)
Request to
send (RTS)
Cut 1
Out 2
(INTE)
Loop
0
0
0
5
Line status
Register
(read only)
LSR
Data
Ready
(DR)
Overrun
Error
(OE)
Parity
Error
(PE)
Framing
Error
(FE)
Break
Interrupt (BI)
Transmitter
Holding
Register
Empty
(THRE)
Transmitter
Empty
(TEMT)
Error in
RCVR
FIFO(``)
(EIRF)
6
MODEM
Status
Register
MSR
Delta
Clear to
Send
(DCTS)
Delta
Data set
Ready
(DDSR)
Trailing
Edge Ring
Indicator
(TERI)
Delta
Receiver
Line
Detect
(DRLSD)
Clear to
Send (CTS)
Data Set
Ready
(DSR)
Ring
Indicator
(RI)
Receive
Line Signal
Detect
(RLSD)
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Register address
7
Scratch
Pad
Register
SCR
Bit 0
Bit 1
Bit 2
Bit 3
Bit 4
Bit 5
Bit 6
Bit 7
IMP16C552
IMP16C552
0DLAB=1
Divisor
Latch
(LSB)
DLL
Bit 0
Bit 1
Bit 2
Bit 3
Bit 4
Bit 5
Bit 6
Bit 7
1DLAB=1
Divisor
Latch
(MSB)
DLM
Bit 8
Bit 9
Bit 10
Bit 11
Bit 12
Bit 13
Bit 14
Bit 15
© 2002 IMP, Inc.