Motorola MPC860 PowerQUICC User Manual page 343

Name Reset
PB[23] Hi-Z
SMSYN1
SDACK1
PB[22] Hi-Z
SMSYN2
SDACK2
PB[21] Hi-Z
SMTXD2
L1CLKOB
PB[20] Hi-Z
SMRXD2
L1CLKOA
PB[19] Hi-Z
RTS1
L1ST1
PB[18] Hi-Z
RTS2
L1ST2
PB[17] Hi-Z
L1RQb
L1ST3
4
RTS3
PB[16] Hi-Z
L1RQa
L1ST4
4
RTS4
PB[15] Hi-Z
BRGO3
PB[14] Hi-Z
RSTRT1
MOTOROLA
Table 13-1. Signal Descriptions (Continued)
Number Type
K17 Bidirectional
(Optional:
Open-drain)
L19 Bidirectional
(Optional:
Open-drain)
K16 Bidirectional
(Optional:
Open-drain)
L16 Bidirectional
(Optional:
Open-drain)
N19 Bidirectional
(Optional:
Open-drain)
N17 Bidirectional
(Optional:
Open-drain)
P18 Bidirectional
(Optional:
Open-drain)
N16 Bidirectional
(Optional:
Open-drain)
R17 Bidirectional General-Purpose I/O Port B Bit 15ÑBit 15 of the
U18 Bidirectional General-Purpose I/O Port B Bit 14ÑBit 14 of the
Chapter 13. External Signals
Description
General-Purpose I/O Port B Bit 23ÑBit 23 of the
general-purpose I/O port B.
SMSYN1ÑSMC1 external sync input.
SDACK1ÑSDMA acknowledge 1 output that is used as a
peripheral interface signal for IDMA emulation, or as a CAM
interface signal for Ethernet.
General-Purpose I/O Port B Bit 22ÑBit 22 of the
general-purpose I/O port B.
SMSYN2ÑSMC2 external sync input.
SDACK2ÑSDMA acknowledge 2 output that is used as a
peripheral interface signal for IDMA emulation, or as a CAM
interface signal for Ethernet.
General-Purpose I/O Port B Bit 21ÑBit 21 of the
general-purpose I/O port B.
SMTXD2ÑSMC2 transmit data output.
L1CLKOBÑClock output from the serial interface TDMb.
General-Purpose I/O Port B Bit 20ÑBit 20 of the
general-purpose I/O port B.
SMRXD2ÑSMC2 receive data input.
L1CLKOAÑClock output from the serial interface TDMa.
General-Purpose I/O Port B Bit 19ÑBit 19 of the
general-purpose I/O port B.
RTS1ÑRequest to send modem line for SCC1.
L1ST1ÑOne of four output strobes that can be generated by
the serial interface.
General-Purpose I/O Port B Bit 18ÑBit 18 of the
general-purpose I/O port B.
RTS2ÑRequest to send modem line for SCC2.
L1ST2ÑOne of four output strobes that can be generated by
the serial interface.
General-Purpose I/O Port B Bit 17ÑBit 17 of the
general-purpose I/O port B.
L1RQbÑD-channel request signal for serial interface TDMb.
L1ST3ÑOne of four output strobes that can be generated by
the serial interface.
4
RTS3 ÑRequest to send modem line for SCC3.
General-Purpose I/O Port B Bit 16ÑBit 16 of the
general-purpose I/O port B.
L1RQaÑD-channel request signal for serial interface TDMa.
L1ST4ÑOne of four output strobes that can be generated by
the serial interface.
4
RTS4 ÑRequest to send modem line for SCC4.
general-purpose I/O port B.
BRGO3ÑBRG3 output clock.
general-purpose I/O port B.
RSTRT1ÑSCC1 serial CAM interface outputs that marks the
start of a frame.
Part IV. Hardware Interface
13-17