Motorola M68HC11EVBU User Manual page 97

Table 6-4. MCU I/O Port Connectors (P4 and P5) Pin Assignments (continued)
Pin Number Signal Mnemonic
43, PE0,
44, PE4,
45, PE1,
46, PE5,
47, PE2,
48, PE6,
49, PE3,
50
51
52
–
53 56 SPARE
57, 58
59, 60 GND
M68HC11EVBU/D
PORT E (bits 0-7)
input lines.
PE7
VRL VOLTAGE REFERENCE LOW – Input reference supply voltage
(low) line for the MCU analog-to-digital (A/D) converter.
VRH VOLTAGE REFERENCE HIGH – Input reference supply voltage
(high) line for the MCU A/D converter.
Spare pins (see schematic diagram).
VCC +5 Vdc
Ground
SUPPORT INFORMATION
Signal Name And Description
–
General purpose input and/or A/D channel
6-5