
21
TSPC860 [Preliminary]
2129B–HIREL–12/04
PB[23]
SMSYN1
SDACK1
K17
Bidirectional
(Optional:
Open-drain)
General-Purpose I/O Port B Bit 23—Bit 23 of the general-purpose
I/O port B.
SMSYN1—SMC1 external sync input.
SDACK1—SDMA acknowledge 1 output that is used as a peripheral
interface signal for IDMA emulation, or as a CAM interface signal for
Ethernet.
PB[22]
SMSYN2
SDACK2
L19
Bidirectional
(Optional:
Open-drain)
General-Purpose I/O Port B Bit 22—Bit 22 of the general-purpose
I/O port B.
SMSYN2—SMC2 external sync input.
SDACK2—SDMA acknowledge 2 output that is used as a peripheral
interface signal for IDMA emulation, or as a CAM interface signal for
Ethernet.
PB[21]
SMTXD2
L1CLKOB
K16
Bidirectional
(Optional:
Open-drain)
General-Purpose I/O Port B Bit 21—Bit 21 of the general-purpose
I/O port B.
SMTXD2—SMC2 transmit data output.
L1CLKOB—Clock output from the serial interface TDM port B.
PB[20]
SMRXD2
L1CLKOA
L16
Bidirectional
(Optional:
Open-drain)
General-Purpose I/O Port B Bit 20—Bit 20 of the general-purpose
I/O port B.
SMRXD2—SMC2 receive data input.
L1CLKOA—Clock output from the serial interface TDM port A.
PB[19]
RTS1
L1ST1
N19
Bidirectional
(Optional:
Open-drain)
General-Purpose I/O Port B Bit 19—Bit 19 of the general-purpose
I/O port B.
RTS1—Request to send modem line for SCC1.
L1ST1—One of four output strobes that can be generated by the
serial interface.
PB[18]
RTS2
L1ST2
N17
Bidirectional
(Optional:
Open-drain)
General-Purpose I/O Port B Bit 18—Bit 18 of the general-purpose
I/O port B.
RTS2—Request to send modem line for SCC2.
L1ST2—One of four output strobes that can be generated by the
serial interface.
PB[17]
L1RQB
L1ST3
Hi-Z
P18
Bidirectional
(Optional:
Open-drain)
General-Purpose I/O Port B Bit 17—Bit 17 of the general-purpose
I/O port B.
L1RQB—D-channel request signal for the serial interface TDM port
B.
L1ST3—One of four output strobes that can be generated by the
serial interface.
PB[16]
L1RQA
L1ST4
N16
Bidirectional
(Optional:
Open-drain)
General-Purpose I/O Port B Bit 16—Bit 16 of the general-purpose
I/O port B.
L1RQA—D-channel request signal for the serial interface TDM port
A.
L1ST4—One of four output strobes that can be generated by the
serial interface.
PB[15]
BRGO3
R17
Bidirectional
General-Purpose I/O Port B Bit 15—Bit 15 of the general-purpose
I/O port B.
BRGO3—BRG3 output clock.
Table 1.
Signal Descriptions (Continued)
Name
Reset
Number
Type
Description