PIC16HV540 Datasheet, PDF (6/36 Pages) Microchip Technology – Enhanced PIC16C54 EPROM-Based 8-Bit CMOS Microcontroller With On-Chip Voltage Regulator

PIC16HV540
4.0 MEMORY ORGANIZATION
FIGURE 4-1: PIC16HV540 PROGRAM
MEMORY MAP AND STACK
PC<8:0>
9
CALL, RETLW
Stack Level 1
Stack Level 2
Stack Level 3
Stack Level 4
000h
On-chip
Program
Memory
0FFh
100h
Reset Vector
1FFh
FIGURE 4-2: PIC16HV540 REGISTER FILE
MAP
File Address
00h
01h
02h
03h
04h
05h
06h
07h
08h
INDF⁽¹⁾
TMR0
PCL
STATUS
FSR
PORTA
PORTB
TRISA
TRISB
OPTION2
0Fh
General
10h
Purpose
Registers
1Fh
Note 1: Not a physical register.
TABLE 4-1: SPECIAL FUNCTION REGISTER SUMMARY
Address
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Value on
Power-On
Reset
Value on
MCLR and
WDT Reset
N/A
TRIS
I/O control registers (TRISA, TRISB)
1111 1111 1111 1111
N/A
OPTION Contains control bits to configure Timer0 and Timer0/WDT prescaler
--11 1111 --11 1111
N/A
OPTION2 Contains control bits to configure pin changes, software enabled WDT, ^{xx11 1111 xx11 1111}
regulation and brown-out
00h
INDF
Uses contents of FSR to address data memory (not a physical register) xxxx xxxx uuuu uuuu
01h
TMR0
8-bit real-time clock/counter
xxxx xxxx uuuu uuuu
02h⁽¹⁾
PCL
Low order 8 bits of PC
1111 1111 1111 1111
03h
STATUS
PCF PA1 PA0
TO
PD
Z
DC
C
1001 1xxx 100q quuu
04h
FSR
Indirect data memory address pointer
1xxx xxxx 1uuu uuuu
05h
PORTA
—
—
—
—
RA3 RA2 RA1 RA0 ---- xxxx ---- uuuu
06h
PORTB
RB7 RB6 RB5 RB4 RB3 RB2 RB1 RB0 xxxx xxxx uuuu uuuu
Legend: Shaded boxes = unimplemented or unused, – = unimplemented, read as '0' (if applicable)
x = unknown, u = unchanged, q = value depends on condition.
Note 1: The upper byte of the Program Counter is not directly accessible. See Section 4.5 of the PIC16C5X data sheet (DS30453)
for an explanation of how to access these bits.
2: File address 07h is a general purpose register on the PIC16HV540.
3: PCF This bit is set to 1 after power up-reset (POR) or sleep command.
4: PCF This bit is set to 0 after a wake up on pin change event.
DS40197A-page 6
Preliminary
© 1998 Microchip Technology Inc.