2-2
MPC180E Security Processor User’s Manual
PRELIMINARY—SUBJECT TO CHANGE WITHOUT NOTICE
Signal Descriptions
TA
61
O
Transfer Acknowledge: This signal is asserted by the MPC180E when a
successful read or write has occurred.
PSDVAL
82
I
Data valid: This active low signal is ignored when CONFIG=0 (MPC860
Mode), but is active in MPC8260 Mode. The assertion of PSDVAL indicates
that a data beat is valid on the data bus.
Miscellaneous pins
RESET
52
I
Reset: asynchronous reset signal for initializing the chip to a known state. It
is highly recommended that this signal be connected to a dual
hardware/software reset function. Thus, the system designer can reset the
MPC180E chip with optimal flexibility.
CONFIG
57
I
Configuration: input that indicates whether the interface is to an MPC860 or
MPC8260
1 = 8260 interface
0 = 860 interface
ENDIAN
40
I
Endian: active high for big endian mode. Low for little endian mode
(MPC860 only).
1 = big endian
0 = little endian
IRQ
85
O
Interrupt Request: interrupt line that signifies that one or more EU modules
has asserted its IRQ hardware interrupt.
NC
26, 27, 49,
50, 51, 76,
100
—
No connection to the pin
DMA Hardware Handshake pins
DREQ1
83
O
DMA Request 1: active low signal which indicates that either the input or
output buffer is requesting data transfer by the host or DMA controller.
DREQ1 and DREQ2 are each programmable to refer to the MPC180E chip
input buffer or output buffer. This signal is designed to interoperate with a
PowerQUICC IDMA channel.
DREQ2
84
O
DMA request 2: active low signal which indicates that either the input or
output buffer is requesting data transfer by the host or DMA controller.
DREQ1 and DREQ2 are each programmable to refer to the MPC180E Chip
input buffer or output buffer. This signal is designed to interoperate with a
PowerQUICC IDMA channel.
Clock
CLK
59
I
Master clock input
Test
TCK
47
I
JTAG test clock
TDI
48
I
JTAG test data input
TDO
44
I
JTAG test data output
TMS
46
I
JTAG test mode select
TRSTB
45
I
JTAG test reset
Table 2-1. Pin Descriptions (Continued)
Signal
name
Pin
locations
Signal
type
Description
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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