MC68HC705B16CFN

Manufacturer Part NumberMC68HC705B16CFN
DescriptionIC MCU 2.1MHZ 15K OTP 52-PLCC
ManufacturerFreescale Semiconductor
SeriesHC05
MC68HC705B16CFN datasheet
 


Specifications of MC68HC705B16CFN

Core ProcessorHC05Core Size8-Bit
Speed2.1MHzConnectivitySCI
PeripheralsPOR, WDTNumber Of I /o32
Program Memory Size15KB (15K x 8)Program Memory TypeOTP
Eeprom Size256 x 8Ram Size352 x 8
Voltage - Supply (vcc/vdd)4.5 V ~ 5.5 VData ConvertersA/D 8x8b
Oscillator TypeInternalOperating Temperature-40°C ~ 85°C
Package / Case52-PLCCLead Free Status / RoHS StatusContains lead / RoHS non-compliant
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
42
43
44
45
46
47
48
49
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
Page 161
162
Page 162
163
Page 163
164
Page 164
165
Page 165
166
Page 166
167
Page 167
168
Page 168
169
Page 169
170
Page 170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
Page 168/302

Download datasheet (4Mb)Embed
PrevNext
C.3
EPROM registers
C.3.1
EPROM control register
EPROM/ECLK control
(1) This bit is a copy of the EPP bit in the options register at $1EFE and therefore its state on reset will be the same as that for the
EPP bit.
Bit 7 — Factory use only
This bit is strictly for factory use only and will always read zero.
EPPT — EPROM protect test bit
This bit is a copy of the EPROM protect bit (EPP) located in the option register. When ELAT is set,
the EPPT bit can be tested by the software to check if the EPROM array is protected or not, since
the EPROM content is not available when ELAT is set.
POR or external reset modifies this bit to reflect the state of the EPP bit in the options register.
ELAT — EPROM programming latch enable bit
1 (set)
When set, this bit allows latching of the address and up to 4 data
bytes for further programming, provided EPGM is zero.
0 (clear) –
When cleared, program and interrupt routines can be executed and
data can be read in the EPROM or firmware ROM.
STOP, power-on and external reset clear this bit.
EPGM — EPROM programming bit
This bit is the EPROM program enable bit. It can be set to ‘1’ to enable programming only after
ELAT is set and at least one byte is written to the EPROM. It is not possible to clear EPGM by
software, but clearing ELAT will always clear EPGM.
ECLK — External clock option bit
See
Section
4.3.
14
Freescale
C-6
Address
bit 7
bit 6
bit 5
bit 4
(1)
$0007
EPPT
ELAT EPGM ECLK
MC68HC705B5
State
bit 3
bit 2
bit 1
bit 0
on reset
u?00 0uuu
MC68HC05B6
Rev. 4.1