MC68HC705J1A

Manufacturer Part NumberMC68HC705J1A
ManufacturerMotorola
MC68HC705J1A datasheet
 


Specifications of MC68HC705J1A

CaseDIP-20L  
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
Page 41
42
Page 42
43
Page 43
44
Page 44
45
Page 45
46
Page 46
47
Page 47
48
Page 48
49
Page 49
50
Page 50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
Page 41/162

Download datasheet (2Mb)Embed
PrevNext
Take these steps to program the mask option register:
1. Apply the programming voltage, V
2. Write to the MOR.
3. Set the MPGM bit and wait for a time, t
4. Clear the MPGM bit.
5. Reset the MCU.
Address:
Read:
Write:
Reset:
SOSCD — Short Oscillator Delay Bit
The SOSCD bit controls the oscillator stabilization counter. The
normal stabilization delay following reset or exit from stop mode is
4064 t
delay.
EPMSEC — EPROM Security Bit
The EPMSEC bit controls access to the EPROM/OTPROM.
OSCRES — Oscillator Internal Resistor Bit
The OSCRES bit enables a 2-M
circuit.
NOTE:
Program the OSCRES bit to logic 0 in devices using RC oscillators.
MC68HC705J1A — Rev. 4.0
MOTOROLA
$07F1
Bit 7
6
5
SOSCD
EPMSEC OSCRES
Unaffected by reset
Figure 2-4. Mask Option Register (MOR)
. Setting SOSCD enables a short oscillator stabilization
cyc
1 = Short oscillator delay enabled
0 = Short oscillator delay disabled
1 = External access to EPROM/OTPROM denied
0 = External access to EPROM/OTPROM not denied
1 = Oscillator internal resistor enabled
0 = Oscillator internal resistor disabled
Memory
Mask Option Register
, to the IRQ/V
PP
PP
.
MPGM
4
3
2
1
SWAIT
SWPDI
PIRQ
LEVEL
internal resistor in the oscillator
Memory
pin.
Bit 0
COPEN
Technical Data
41