MC68HC05B6
Rev. 4

MOTOROLA

2-3

MODES OF OPERATION AND PIN DESCRIPTIONS

2

Figure 2-1 MC68HC05B6 ‘load program in RAM and execute’ schematic diagram

32

OSC1

OSC2

IRQ

TCAP2

TCMP2

TCAP1

PB7
PB6
PB5
PB4
PB3
PB2
PB1
PB0

PC7
PC6
PC5
PC4
PC3
PC2
PC1
PC0

VSS

PD7
PD6
PD5

PD4

PD3

PD2
PD1
PD0

PA7
PA6
PA5
PA4
PA3
PA2
PA1
PA0

RESET

VDD

18

24
25
26
27
28
29
30
31

16

17

19

41

10 k

Ω

0.01

µ

F

10 nF

47

µ

F

10 M

Ω

4 MHz

22 pF

22 pF

P1

GND
+5V
2xV

DD

RESET

10

VRH

VRL

VPP1

PLMA

PLMB

TCMP1

RDI

TDO

NC

NC

RS232 level translator

suggested:

MC145406 or MAX232

9600 Bd

RS232

SCLK

10 k

Ω

11

9

22

8

7

40

20

21

51

1

23

2

3
4
5
12
13
14

33
34
35
36
37
38
39

42
43
44
45
46
47
48
49

6

15

50

52

Connect as required
for the application

Connect as required

for the application

MC68HC05B6 (52-pin package)

TPG

29

05B6Book Page 3 Tuesday, April 6, 1999 8:24 am