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21
TSPC860
2129A–HIREL–08/02
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