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HMS77C2000/2001
Oct. 2002 Ver 1.1
1
Table of Contents
1. GENERAL DESCRIPTION ...................2
Application .................................................. 2
One-Time-Programmable (OTP) Devices .. 2
2. BLOCK DIAGRAM ................................3
3. PIN ASSIGNMENT ...............................3
4. PACKAGE DIAGRAM ...........................4
5. PIN FUNCTION .....................................5
6. PORT STRUCTURES ...........................6
7. ELECTRICAL CHARACTERISTICS .....8
Absolute Maximum Ratings ........................ 8
Recommended Operating Conditions ......... 8
DC Characteristics (1) ................................ 9
DC Electrical Characteristics (2) ............... 10
AC Electrical Characteristics (1) ............... 11
AC Electrical Characteristics (2) ............... 12
Typical Characteristics .............................. 13
8. ARCHITECTURAL OVERVIEW ..........16
CPU Architecture ...................................... 16
Clocking Scheme/Instruction Cycle .......... 17
Instruction Flow/Pipelining ........................ 17
9. MEMORY ORGANIZATION ................18
Program Memory Organization ................. 18
Data Memory Organization ....................... 18
STATUS Register ..................................... 21
OPTION Register ...................................... 21
OSCCAL Register ..................................... 23
Program Counter ...................................... 23
Stack ......................................................... 24
Indirect Data Addressing; INDF and FSR
Registers ................................................... 25
10. I/O PORT ..........................................26
UPIO ......................................................... 26
TRIS Register ............................................26
I/O Interfacing ............................................26
I/O Programming Considerations ..............27
11. TIMER0 MODULE AND TMR0
REGISTER ..........................................29
Using Timer0 with an External Clock ........30
Prescaler ...................................................31
12. SPECIAL FEATURES OF THE CPU 33
Configuration Bits ......................................33
Oscillator Configurations ...........................34
Reset .........................................................35
Power-On Reset (POR) .............................37
Internal Reset Timer (IRT) .........................39
Watchdog Timer (WDT) ............................39
Time-Out Sequence, Power Down, and
Wake-up rom LEEP tatus its TO/PD/UPWUF)
40
Reset on Brown-Out ..................................41
Power-Down Mode (SLEEP) .....................41
Program Verification/Code Protection .......42
ID Locations ..............................................42
Power Fail Detection Processor ................42
In-Circuit Serial Programming ...................43
13. IN-CIRCUIT SERIAL PROGRAM-
MING(ICSP) SPECIFICATIONS .........45
Programming The HMS77C200x ..............45
Program Mode Entry .................................45
Configuration Word ...................................49
Code Protection .........................................50
Program/Verify Mode Electrical Characteristics
52