SCC2692AE1B44 Ver la hoja de datos (PDF) - Philips Electronics
Número de pieza
componentes Descripción
Fabricante
SCC2692AE1B44 Datasheet PDF : 30 Pages
| |||
Philips Semiconductors
Dual asynchronous receiver/transmitter (DUART)
Product specification
SCC2692
Table 1. SCC2692 Register Addressing
A3
A2
A1
A0
0
0
0
0
0
0
0
1
0
0
1
0
0
0
1
1
0
1
0
0
0
1
0
1
0
1
1
0
0
1
1
1
1
0
0
0
1
0
0
1
1
0
1
0
1
0
1
1
1
1
0
0
1
1
0
1
1
1
1
0
1
1
1
1
READ (RDN = 0)
Mode Register A (MR1A, MR2A)
Status Register A (SRA)
BRG Test
Rx Holding Register A (RHRA)
Input Port Change Register (IPCR)
Interrupt Status Register (ISR)
Counter/Timer Upper Value (CTU)
Counter/Timer Lower Value (CTL)
Mode Register B (MR1B, MR2B)
Status Register B (SRB)
1X/16X Test
Rx Holding Register B (RHRB)
Reserved
Input Ports IP0 to IP6
Start Counter Command
Stop Counter Command
WRITE (WRN = 0)
Mode Register A (MR1A, MR2A)
Clock Select Register A (CSRA)
Command Register A (CRA)
Tx Holding Register A (THRA)
Aux. Control Register (ACR)
Interrupt Mask Register (IMR)
C/T Upper Preset Value (CRUR)
C/T Lower Preset Value (CTLR)
Mode Register B (MR1B, MR2B)
Clock Select Register B (CSRB)
Command Register B (CRB)
Tx Holding Register B (THRB)
Reserved
Output Port Conf. Register (OPCR)
Set Output Port Bits Command
Reset Output Port Bits Command
* See Table 6 for BRG Test frequencies in this data sheet, and “Extended baud rates for SCN2681, SCN68681, SCC2691, SCC2692,
SCC68681 and SCC2698B” in application notes elsewhere in this publication
Table 2. Register Bit Formats
BIT 7
BIT 6
MR1A
MR1B
RxRTS
CONTROL
0 = No
1 = Yes
RxINT
SELECT
0 = RxRDY
1 = FFULL
BIT 5
ERROR
MODE*
0 = Char
1 = Block
BIT 4
BIT 3
PARITY MODE
00 = With Parity
01 = Force Parity
10 = No Parity
11 = Multidrop Mode
BIT 2
PARITY
TYPE
0 = Even
1 = Odd
BIT 1
BIT 0
BITS PER
CHARACTER
00 = 5
01 = 6
10 = 7
11 = 8
NOTE:
*In block error mode, block error conditions must be cleared by using the error reset command (command 4x) or a receiver reset.
BIT 7
BIT 6
BIT 5
BIT 4
MR2A
MR2B
CHANNEL MODE
00 = Normal
01 = Auto-Echo
10 = Local loop
11 = Remote loop
TxRTS
CONTROL
0 = No
1 = Yes
CTS
ENABLE Tx
0 = No
1 = Yes
NOTE: *Add 0.5 to values shown for 0 – 7 if channel is programmed for 5 bits/char.
BIT 3
0 = 0.563
1 = 0.625
2 = 0.688
3 = 0.750
BIT 2
BIT 1
STOP BIT LENGTH*
4 = 0.813
5 = 0.875
6 = 0.938
7 = 1.000
8 = 1.563
9 = 1.625
A = 1.688
B = 1.750
BIT 0
C = 1.813
D = 1.875
E = 1.938
F = 2.000
CSRA
CSRB
BIT 7
BIT 6
BIT 5
RECEIVER CLOCK SELECT
See Text
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
TRANSMITTER CLOCK SELECT
See Text
* See Table 6 for BRG Test frequencies in this data sheet, and “Extended baud rates for SCN2681, SCN68681, SCC2691, SCC2692,
SCC68681 and SCC2698B” in application notes elsewhere in this publication
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
CRA
CRB
MISCELLANEOUS COMMANDS
See Text and Timing Requirement
DISABLE Tx
0 = No
1 = Yes
ENABLE Tx
0 = No
1 = Yes
DISABLE Rx
0 = No
1 = Yes
ENABLE Rx
0 = No
1 = Yes
NOTE: Access to the miscellaneous commands should be separated by 3 X1 clock edges. A disabled transmitter cannot be loaded.
1998 Sep 04
11
Share Link: 