CD2481 Datasheet, PDF (142/222 Pages) Intel Corporation – Programmable Four-Channel Communications Controller

CD2481 — Programmable Four-Channel Communications Controller
9.2.14.3 Transmit Special Mapped Character 3 (TSPMAP3)
Register Name: TSMAP3
Register Description: Special Mapped Transmit Character 3
Default Value: x’00
Access: Byte Read/Write
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
User Defined Mapped Transmit Character
Intel Hex Address: x’2D
Motorola Hex Address: x’2E
Bit 1
Bit 0
9.2.15
9.2.15.1
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.)
Transmit Async Control Character Maps –
Async-HDLC/PPP Mode Only
Transmit Async Control Character Map 0 (TXACCM0)
Register Name: TXACCM0
Register Description: Transmit Async Control Character Map 0
Default Value: x’00
Access: Byte Read/Write
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Char. 07
Char. 06
Char. 05
Char. 04
Char. 03
Intel Hex Address: x’1C
Motorola Hex Address: x’1F
Bit 2
Char. 02
Bit 1
Char. 01
Bit 0
Char. 00
9.2.15.2 Transmit Async Control Character Map 1 (TXACCM1)
Register Name: TXACCM1
Register Description: Transmit Async Control Character Map 1
Default Value: x’00
Access: Byte Read/Write
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Char. 0F
Char. 0E
Char. 0D
Char. 0C
Char. 0B
Intel Hex Address: x’1D
Motorola Hex Address: x’1E
Bit 2
Char. 0A
Bit 1
Char. 09
Bit 0
Char. 08
142
Datasheet