Holtek HT68F20 Manuals

Manuals and User Guides for Holtek HT68F20. We have 1 Holtek HT68F20 manual available for free PDF download: Manual

Holtek HT68F20 Manual (280 pages)

Enhanced I/O Flash Type 8-Bit MCU with EEPROM

Brand: Holtek | Category: I/O Systems | Size: 8 MB

Table of Contents
2
Features
8
CPU Feat�Res
8
Periphera� Feat�Res
9
Osci
9
General Description
10
Selection Table
11
Block Diagram
12
Pin Assignment
13
Pin Description
17
Absolute Maximum Ratings
22
D.C. Characteristics
22
Characteristics
24
Comparator Electrical Characteristics
25
Power-On Reset Characteristics
25
System Architecture
26
C�Ocking and Pipe�Ining
26
Program Co�Nter
27
Stack
28
Arithmetic and Logic Unit - ALU
28
Flash Program Memory
29
Str�Ct�Re
29
Specia� Vectors
30
Look-�P Tab�E
30
Tab�E Program Examp�E
31
In Circ�It Programming
32
RAM Data Memory
33
Str�Ct�Re
33
Special Function Register Description
37
Indirect Addressing Registers - IAR0, IAR1
37
Memor� Pointers - MP0� MP1
37
Bank Pointer - BP
38
EEPROM Data Memory
43
EEPROM Data Memor� Str�Ct
43
EEPROM Registers
43
Reading Data from the EEPROM
47
Writing Data to the EEPROM
47
Write Protection
47
EEPROM Interr
47
Programming Considerations
48
Oscillator
49
System Clock Configurations
49
Externa� Cr�Sta�/Ceramic Osci
51
Externa� RC Osci
52
Interna� RC Osci
52
Externa� 32.768Khz Cr�Sta� Osci
53
LXT Osci
54
Operating Modes and System Clocks
55
S�Stem C�Ocks
55
S�Stem Operation Modes
57
Contro� Register
58
Fast Wake-�P
60
Operating Mode Switching and Wake-�P
61
NORMAL Mode to SLOW Mode Switching
62
SLOW Mode to NORMAL Mode Switching
63
Entering the SLEEP1 Mode
64
Entering the IDLE0 Mode
64
Entering the IDLE1 Mode
65
Standb� C�Rrent Considerations
65
Wake-�P
66
Programming Considerations
66
Watchdog Timer
67
Watchdog Timer C�Ock So�Rce
67
Watchdog Timer Contro� Register
67
Watchdog Timer Operation
68
Reset and Initialisation
69
Reset F�Nctions
69
Reset Initia� Conditions
72
Input/Output Ports
82
Port a Wake-�P
86
I/O Port Contro� Registers
86
Pin-Remapping F�Nctions
89
Pin-Remapping Registers
89
I/O Pin Str�Ct�Res
96
Programming Considerations
96
Timer Modules - TM
97
Introd�Ction
97
TM Operation
98
TM C�Ock So�Rce
98
TM Interr�Pts
98
TM Externa� Pins
98
TM Inp�T/O�Tp�T Pin Contro� Registers
99
Programming Considerations
109
Compact Type TM
110
Compact TM Operation
110
Compact T�Pe TM Register Description
111
Compact T�Pe TM Operating Modes
115
Compare Match O�Tp�T Mode
115
Timer/Co�Nter Mode
115
PWM O�Tp�T Mode
118
Standard Type TM - STM
121
Standard TM Operation
121
Standard T�Pe TM Register Description
122
Standard T�Pe TM Operating Modes
131
Compare O�Tp�T Mode
131
Timer/Co�Nter Mode
134
PWM O�Tp�T Mode
134
Sing�E P
138
Capt�Re Inp�T Mode
140
Enhanced Type TM - ETM
142
Enhanced TM Operation
143
Enhanced T�Pe TM Operating Modes
150
Compare O�Tp�T Mode
150
Timer/Co�Nter Mode
155
PWM O�Tp�T Mode
155
Sing�E P
161
Capt�Re Inp�T Mode
163
Comparators
166
Comparator Operation
166
Comparator Registers
166
Comparator Interr�Pt
169
Programming Considerations
169
Serial Interface Module - SIM
169
SPI Interface
170
SPI Registers
171
SPI Comm�Nication
174
I 2 C Interface
176
I 2 C Interface Operation
176
I 2 C Registers
177
I 2 C B�S Comm�Nication
181
I 2 C B�S Start Signa
182
S�Ave Address
182
I 2 C B�S Read/Write Signa
183
I 2 C B�S Data and Acknow�Edge Signa
183
Peripheral Clock Output
185
Periphera� C�Ock Operation
185
Interrupts
186
Interr�Pt Registers
186
Interr�Pt Operation
200
Externa� Interr�Pt
204
Comparator Interr�Pt
204
Time Base Interr�Pts
205
Seria� Interface Mod
207
Externa� Periphera� Interr�Pt
207
EEPROM Interr�Pt
207
LVD Interr�Pt
208
TM Interr�Pts
208
Interr�Pt Wake-�P F�Nction
208
Programming Considerations
209
Power down Mode and Wake-Up
210
Entering the IDLE or SLEEP Mode
210
Standb� C�Rrent Considerations
210
Wake-�P
211
Low Voltage Detector - LVD
212
LVD Register
212
LVD Operation
213
SCOM Function for LCD
214
LCD Operation
214
LCD Bias Contro
215
Configuration Options
217
Application Circuits
218
UART Module Serial Interface
219
UART Mod
219
Pin Assignment
220
UART Mod
222
UART Mod
223
UART Mod
225
UART Mod
226
UART Data Transfer Scheme
227
UART Commands
227
UART Stat�S and Contro� Registers
228
Ba�D Rate Generator
233
UART Mod
235
Managing Receiver Errors
240
UART Mod
241
Instruction Set
245
Introd�Ction
245
Instr�Ction Timing
245
Moving and Transferring Data
245
Arithmetic Operations
245
Logica� and Rotate Operation
246
Branches and Contro� Transfer
246
Bit Operations
246
Other Operations
246
Instruction Set Summary
247
Instruction Definition
249

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