Motorola M68HC11EVBU User Manual page 96

SUPPORT INFORMATION
Table 6-4. MCU I/O Port Connectors (P4 and P5) Pin Assignments (continued)
Pin Number Signal Mnemonic
8 XTAL
9,
PC0/AD0,
10, PC1/AD1,
11, PC2/AD2,
12, PC3/AD3,
13,
PC4/AD4,
14, PC5/AD5,
15, PC6/AD6,
16 PC7/AD7
17 RESET*
18 XIRQ*
19 IRQ*
20, PD0/RXD,
21, PD1/TXD,
22, PD2/MISO,
23, PD3/MOSI,
24, PD4/SCK,
25 PD5/SS*
26, PA7/OC1,
27 PA6/OC2
28
29, PA5/OC3,
30, PA4/OC4,
31, PA3/OC5,
32, PA2/IC1,
33, PA1/IC2,
34 PA0/IC3
35, PB7/A15
36, PB6/A14
37, PB5/A13
38, PB4/A12
39, PB3/A11
40, PB2/A10
41, PB1/A9
42 PB0/A8
6-4
CRYSTAL DRIVER
EXTAL input of another MC68HC11 MCU device.
PORT C (bits 0-7)
–
RESET
the MCU.
NON-MASKABLE INTERRUPT
request asynchronous non-maskable interrupts to the MCU.
INTERRUPT REQUEST
asynchronous interrupts to the MCU.
PORT D (bits 0-5)
used with the MCU Serial Communications Interface (SCI) and
Serial Peripheral Interface (SPI).
PORT A (bits 7, 6)
signals.
NC Not connected.
PORT A (bits 5-0)
signals.
PORT B (bits 7-0)
Signal Name And Description
–
An output clock signal used to drive the
–
General purpose I/O lines.
An active low bidirectional control line used to initialize
–
An active low input line used to
–
An active low input line used to request
–
General purpose I/O lines. These lines can be
–
General purpose I/O lines and/or timer
–
General purpose I/O lines and/or timer
–
General purpose output lines.
M68HC11EVBU/D