
CD2481
—
Programmable Four-Channel Communications Controller
142
Datasheet
9.2.14.3
Transmit Special Mapped Character 3 (TSPMAP3)
The three TSPMAP registers are used to provide control character escape processing on characters
outside the 00
–
1F (hex) range. Each of these three registers are scanned to match the character
currently being transmitted; if a match occurs, that character is
‘
escaped
’
before transmission. If a
zero value is found in any of them, the scan is terminated. (Zero is already covered in the standard
TXACCM.)
9.2.15
Transmit Async Control Character Maps
–
Async-HDLC/PPP Mode Only
9.2.15.1
Transmit Async Control Character Map 0 (TXACCM0)
9.2.15.2
Transmit Async Control Character Map 1 (TXACCM1)
Register Name: TSMAP3
Register Description: Special Mapped Transmit Character 3
Default Value: x
’
00
Access: Byte Read/Write
Intel Hex Address: x
’
2D
Motorola Hex Address: x
’
2E
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
User Defined Mapped Transmit Character
Register Name: TXACCM0
Register Description: Transmit Async Control Character Map 0
Default Value: x
’
00
Access: Byte Read/Write
Intel Hex Address: x
’
1C
Motorola Hex Address: x
’
1F
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Char. 07
Char. 06
Char. 05
Char. 04
Char. 03
Char. 02
Char. 01
Char. 00
Register Name: TXACCM1
Register Description: Transmit Async Control Character Map 1
Default Value: x
’
00
Access: Byte Read/Write
Intel Hex Address: x
’
1D
Motorola Hex Address: x
’
1E
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Char. 0F
Char. 0E
Char. 0D
Char. 0C
Char. 0B
Char. 0A
Char. 09
Char. 08