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MC68HC05B6
Rev. 4
MOTOROLA
E-17
MC68HC705B16
14
Figure E-8
RAM/EPROM/EEPROM serial bootstrap schematic diagram
Green LED — programming ended
Flashing green LED — programming
40
VPP6
PC7
PB0
PB1
PB2
PB3
PB4
PB5
PB6
PB7
PA0
PA1
PA2
PA3
PA4
PA5
PA6
PA7
VDD
OSC1
OSC2
TCAP1
IRQ
RESET
VSS
41
1
2
3
P1
GND
+5V
V
PP
1N914
1k
1.0
μ
F
100k
1N914
RESET
RUN
0.01
μ
F
PC5
PC4
PC3
PC2
PC1
PC0
PC6
PLMA
PLMB
470
470
Red LED
Green LED
+
+
VRH
22
μ
F
22
μ
F
22
μ
F
+
2 x 3K
1
3
4
5
2
8
5
6
7
3
2
1
11
12
13
14
15
16
22
μ
F
+
RS232
connector
MAX
232
+5V
9600 BD
8-bit
no parity
19
18
20
21
50
52
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
14
13
12
5
4
3
43
44
45
46
47
48
49
23
2
1
51
22
8
10
7
VRL
TCAP2
TCMP1
TCMP2
SCLK
NC
10nF
47
μ
F
PD0
PD1
PD2
PD5
PD6
PD7
PD4
+
+
22pF
4.0 MHz
22pF
4k7
4k7
12 k
BC239C
B
10k
1nF
1
1 k
+
Serial boot
Eras&
serial boot
47
μ
F
+
PD3
RDI
TDO
Erase check
Red LED — EPROM not erased
Green LED — EPROM erased
Serial boot
Erase check and serial boot
EPROM erase check
VPP1
U2 MC68HC705B16
MCU (socket)
Note:
A minimum V
DD
voltage must be applied to the VPP6 pin at all times,
including power-on, as a lower voltage could damage the device. Unless
otherwise stated, EPROM programming is guaranteed at ambient (25
°
C)
temperature only
TPG