SCC2698B Philips Semiconductors, SCC2698B Datasheet - Page 14

• Manufacturer Part Number: SCC2698B
• Description: Enhanced octal universal asynchronous receiver/transmitter Octal UART
• Manufacturer: Philips Semiconductors

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Philips Semiconductors
Table 2. Register Bit Formats (Continued)
CSR (Clock Select Register)
* See Table 5 for BRG Test frequencies in this data sheet, and “Extended baud rates for SCN2681, SCN68681, SCC2691, SCC2692,
SCC68681 and SCC2698B” Philips Semiconductors ICs for Data Communications, IC-19, 1994.
OPCR (Output Port Configuration Register) This register controls the MPP I/O pins and the MPO multi-purpose output pins.
ACR (Auxiliary Control Register)
IPCR (Input Port Change Register)
ISR (Interrupt Status Register)
IMR (Interrupt Mask Register)
CTPU (Counter/Timer Upper Register)
CTPU (Counter/Timer Lower Register)
IPR (Input Port Register) MPP and MPI Pins
NOTE: When TxEMT and TxRDY bits are at one just before a write to the Transmit Holding register, a command to disable the transmitter
should be delayed until the TxRDY is at one again. TxRDY will set to one at the end of the start bit time.
2000 Jan 31
NOTE: *Only OPCR[3] in block A controls the power-down mode.
MPP Function
Delta MPI1b
Enhanced octal universal asynchronous
receiver/transmitter (Octal UART)
BRG Select
Change INT
1 = output
MPI Port
MPI Port
0 = input
0 = set 1
1 = set 2
Change
1 = High
0 = Low
1 = Yes
1 = Yes
C/T[15]
MPP2b
Select
0 = No
0 = No
C/T[7]
0 = off
1 = on
Bit 7
Delta BREAKb
Delta BREAKb
Delta MPI0b
1 = High
0 = Low
1 = Yes
1 = Yes
C/T[14]
MPP1b
0 = No
0 = No
0 = off
1 = on
C/T[6]
Receiver Clock Select
Bit 6
INT
Counter/Timer Mode and Source
MPOb Pin Function Select
See text
111 = RxRDY/FF
101 = RxC (16X)
011 = TxC (16X)
100 = RxC (1X)
010 = TxC (1X)
110 = TxRDY
Delta MPI1a
FFULLb INT
000 = RTSN
001 = C/TO
See Text
RxRDY/
FFULLb
RxRDY/
1 = High
0 = Low
C/T[13]
1 = Yes
1 = Yes
MPP2a
0 = No
0 = No
0 = off
1 = on
C/T[5]
Bit 5
TxRDYb INT
Delta MPI0a
TxRDYb
1 = High
0 = Low
1 = Yes
1 = Yes
C/T[12]
MPP1a
0 = No
0 = No
1 = on
C/T[4]
0 = off
Bit 4
14
Power-Down
Ready INT
MPI1bINT
Counter
Counter
1 = High
1 = High
0 = Low
0 = Low
1 = Yes
C/T[11]
1 = On
Mode*
0 = Off
MPI1b
Ready
0 = No
MPI1b
0 = off
1 = on
0 = off
1 = on
C/T[3]
Delta
Bit 3
Delta BREAKa
Delta BREAKa
MPI0bINT
Transmitter Clock Select
1 = High
1 = High
0 = Low
0 = Low
1 = Yes
C/T[10]
0 = No
1 = on
MPI0b
1 = on
C/T[2]
MPI0b
0 = off
0 = off
Delta
Bit 2
INT
MPOa Pin Function Select
See text
101 = RxC (16X)
111 = RxRDY/FF
011 = TxC (16X)
100 = RxC (1X)
010 = TxC (1X)
110 = TxRDY
000 = RTSN
FFULLa INT
001 = C/TO
MPI1aINT
1 = High
FFULLa
1 = High
0 = Low
RxRDY/
RxRDY/
0 = Low
1 = Yes
MPI1a
0 = No
MPI1a
0 = off
1 = on
0 = off
1 = on
C/T[9]
C/T[1]
Delta
Bit 1
SCC2698B
Product specification
TxRDYa INT
MPI0aINT
TxRDYa
1 = High
1 = High
0 = Low
0 = Low
1 = Yes
0 = No
MPI0a
C/T[8]
C/T[0]
MPI0a
0 = off
1 = on
0 = off
1 = on
Delta
Bit 0