MC68HC05B4 Datasheet, PDF (177/298 Pages) Motorola, Inc – High-density Complementary Metal Oxide Semiconductor (HCMOS) Microcomputer Unit

100kΩ
1N914
RESET
1kΩ
RUN
1N914
1.0µF
+
0.01µF
Red LED
470Ω
470Ω
Green LED
10nF
22 8 10
TCAP1 VRH VDD
19 _IRQ
18 RESET OSC1
OSC2
20 _PLMA
21 _PLMB
22pF
+
47µF
10MΩ
4.0 MHz
22pF
P1 1
2
3
GND
+5V
V_PP
47µF ₊
Erase check
Green — EPROM erased
Red — EPROM not erased
Serial boot
Green — programming OK
Red — programming error
9600 BD
8-bit
no parity
8
5
RS232 ⁷
Connector ³
2
1
2+2µF +5V
2 x 3KΩ
16
1
2
3
2+2µF _{6 MAX 4}
232 ⁵
13
12
14
11
15
+22_µF
+22_µF
PD3
MC68HC705B5
PD4
Serial boot
Erase check
1 kΩ
39 _PB0
38 _PB1
37 _PB2
36 _PB3
35 _PB4
34 _PB5
33 _PB6
32 _PB7
VPP6
PC7
4k7Ω
4k7Ω
31
30
29
28
27
26
25
24
PA0
PA1
PA2
PA3
PA4
PA5
PA6
PA7
PC6 ⁴³
PC5 ⁴⁴
PC4 ⁴⁵
14
13
12
5
4
3
PD0
PD1
PD2
PD5
PD6
PD7
50
52
RDI
TDO
VSS
PC3
PC2
PC1
PC0
TCAP2
TCMP1
TCMP2
SCLK
VRL ^NC
46
47
48
49
23
2
1
51
40
41
7
10 kΩ
12 kΩ
BC239C
1nF ⁺
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
Figure C-7 EPROM (RAM) serial bootstrap schematic diagram
14
MC68HC05B6
Rev. 4
MC68HC705B5
TPG
MOTOROLA
C-15