PIC16C61 View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

PIC16C61

8-Bit CMOS Microcontrollers

Microchip Technology 

PIC16C6X

TABLE 4-5: SPECIAL FUNCTION REGISTERS FOR THE PIC16C65/65A/R65 (Cont.’d)

Address Name

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

Value on:

POR,

BOR

Value on

all other

resets(3)

Bank 1

80h(1) INDF

81h

OPTION

82h(1) PCL

83h(1) STATUS

84h(1) FSR

85h

TRISA

86h

TRISB

87h

TRISC

Addressing this location uses contents of FSR to address data memory (not a physical register)

RBPU INTEDG T0CS

T0SE

PSA

PS2

PS1

PS0

Program Counter's (PC) Least Significant Byte

IRP(5)

RP1(5)

RP0

TO

PD

Z

DC

C

Indirect data memory address pointer

—

— PORTA Data Direction Register

PORTB Data Direction Register

PORTC Data Direction Register

0000 0000 0000 0000

1111 1111 1111 1111

0000 0000 0000 0000

0001 1xxx 000q quuu

xxxx xxxx uuuu uuuu

--11 1111 --11 1111

1111 1111 1111 1111

1111 1111 1111 1111

88h

TRISD

PORTD Data Direction Register

1111 1111 1111 1111

89h

TRISE

IBF

OBF

IBOV PSPMODE

—

PORTE Data Direction Bits

0000 -111 0000 -111

8Ah(1,2) PCLATH

—

—

— Write Buffer for the upper 5 bits of the Program Counter

---0 0000 ---0 0000

8Bh(1) INTCON

GIE

PEIE

T0IE

INTE

RBIE

T0IF

INTF

RBIF 0000 000x 0000 000u

8Ch

PIE1

PSPIE

(6)

RCIE

TXIE

SSPIE CCP1IE TMR2IE TMR1IE 0000 0000 0000 0000

8Dh

PIE2

—

—

—

—

—

8Eh

PCON

—

—

—

—

—

8Fh

—

Unimplemented

90h

—

Unimplemented

91h

—

Unimplemented

92h

PR2

Timer2 Period Register

93h

SSPADD Synchronous Serial Port (I2C mode) Address Register

94h

SSPSTAT

—

—

D/A

P

S

95h

—

Unimplemented

96h

—

Unimplemented

97h

—

Unimplemented

—

—

CCP2IE ---- ---0 ---- ---0

—

POR

BOR(4) ---- --qq ---- --uu

—

—

—

—

—

—

1111 1111 1111 1111

0000 0000 0000 0000

R/W

UA

BF --00 0000 --00 0000

—

—

—

—

—

—

98h

TXSTA

CSRC

TX9

TXEN

SYNC

—

BRGH

TRMT

TX9D 0000 -010 0000 -010

99h

SPBRG Baud Rate Generator Register

0000 0000 0000 0000

9Ah

—

Unimplemented

—

—

9Bh

—

Unimplemented

—

—

9Ch

—

Unimplemented

—

—

9Dh

—

Unimplemented

—

—

9Eh

—

Unimplemented

—

—

9Fh

—

Unimplemented

—

—

Legend:

Note 1:

2:

3:

4:

5:

6:

x = unknown, u = unchanged, q = value depends on condition, - = unimplemented location read as '0'.

Shaded locations are unimplemented, read as ‘0’.

These registers can be addressed from either bank.

The upper byte of the Program Counter (PC) is not directly accessible. PCLATH is a holding register for the PC whose

contents are transferred to the upper byte of the program counter. (PC<12:8>)

Other (non power-up) resets include external reset through MCLR and the Watchdog Timer reset.

The BOR bit is reserved on the PIC16C65, always maintain this bit set.

The IRP and RP1 bits are reserved on the PIC16C65/65A/R65, always maintain these bits clear.

PIE1<6> and PIR1<6> are reserved on the PIC16C65/65A/R65, always maintain these bits clear.

© 1997 Microchip Technology Inc.

DS30234D-page 31

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