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P/N:PM0625 Specifications subject to change without notice, contact your sales representatives for the most update information. REV. 1.0, JUL. 01, 2005
MX10EXA
PIN DESCRIPTIONS
MNEMONIC
PIN. NO.
TYPE
NAME AND FUNCTION
PLCC
LQFP
V SS
1, 22
16,39
I
Ground: 0V reference.
V DD
23, 44
17,38
I
Power Supply: This is the power supply voltage for normal, idle, and
power down operation.
P0.0-P0.7
43-36
37-30
I/O
Port 0: Port 0 is an 8-bit I/O port with a user-configurable output type.
Port 0 latches have 1s written to them and are configured in the quasi-
bidirectional mode during reset. The operation of port 0 pins as inputs
and outputs depends upon the port configuration selected. Each port
pin is configured independently. Refer to the section on I/O port con-
figuration and the DC Electrical Characteristics for details.
When the external program/data bus is used, Port 0 becomes the mul-
tiplexed low data/instruction byte and address lines 4 through 11.
P1.0-P1.7
2-9
40-44,
I/O
Port 1: Port 1 is an 8-bit I/O port with a user-configurable output type.
1-3
Port 1 latches have 1s written to them and are configured in the quasi-
bidirectional mode during reset. The operation of port 1 pins as inputs
and outputs depends upon the port configuration selected. Each port
pin is configured independently. Refer to the section on I/O port con-
figuration and the DC Electrical Characteristics for details.
Port 1 also provides special functions as described below.
240
O
A0/WRH: Address bit 0 of the external address bus when the external
data bus is configured for an 8 bit width. When the external data bus is
configured for a 16 bit width, this pin becomes the high byte write
strobe.
341
O
A1: Address bit 1 of the external address bus.
442
O
A2: Address bit 2 of the external address bus.
543
O
A3: Address bit 3 of the external address bus.
644
I
RxD1 (P1.4): Receiver input for serial port 1.
71
O
TxD1 (P1.5): Transmitter output for serial port 1.
8
2
I/O
T2 (P1.6): Timer/counter 2 external count input/clockout.
93
I
T2EX (P1.7): Timer/counter 2 reload/capture/direction control
P2.0-P2.7
24-31
18-25
I/O
Port 2: Port 2 is an 8-bit I/O port with a user-configurable output type.
Port 2 latches have 1s written to them and are configured in the quasi-
bidirectional mode during reset. The operation of port 2 pins as inputs
and outputs depends upon the port configuration selected. Each port
pin is configured independently. Refer to the section on I/O port con-
figuration and the DC Electrical Characteristics for details.
When the external program/data bus is used in 16-bit mode, Port 2
becomes the multiplexed high data/instruction byte and address lines
12 through 19. When the external program/data bus is used in 8-bit
mode, the number of address lines that appear on port 2 is user pro-
grammable.