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Chapter 19
Signal Descriptions
This chapter provides a listing and brief description of all the MCF5272 signals. It shows
it shows which are inputs or outputs, how they are multiplexed, and the state of each signal
at reset. The first listing is organized by function with signals appearing alphabetically
within each functional group. This is followed by a second listing sorted by pin number.
Some pins serve as many as four different functions.
19.1 Signal List
Table 19-1 summarizes the signals, showing default pin functions after system reset.
General-purpose port signals all default to inputs after reset. Table 19-2 presents the same
information sorted by pin number instead of signal function.
In this manual, the term 'asserted' indicates the active signal
state; 'negated' indicates inactive. Names of active-low signals
are given overbars, for example, INT1 and SDWE.
Table 19-1. Signal Descriptions Sorted by Function
Configured
by
0 (Reset)
(see notes)
A0
A1
A10
A10_PRECHG
A11
A12
A13
A14
A15
NOTE:
Pin Functions
1
2
–
–
SDA0
–
SDA9
SDA8
–
–
–
SDA9
SDA11
–
SDA12
SDA11
SDA13
SDA12
–
–
Chapter 19. Signal Descriptions
Description
3
–
A0
–
A1/SDRAM-16bit A0
–
A10/SDRAM-16bit
A9/SDRAM-32bit A8
–
SDRAM
A10_Precharge
–
A11/SDRAM-32bit A9
–
A12/SDRAM-16bit A11
–
A13/SDRAM-16bit
A12/SDRAM-32bit A11
–
A14/SDRAM-16bit
A13/SDRAM-32bit A12
–
A15
Map
Drive
BGA
I/O
Cpf
(mA)
Pin
D10
O
7
50
B12
O
7
50
D12
O
7
50
D14
O
11
50
C11
O
7
50
B11
O
7
50
A11
O
7
50
C10
O
7
50
D9
O
7
50
19-1
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