PIC16C923T-08I/SP View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

PIC16C923T-08I/SP

8-Bit CMOS Microcontroller with LCD Driver

Microchip Technology 

PIC16C9XX

4.2.2 SPECIAL FUNCTION REGISTERS

The Special Function Registers are registers used by

the CPU and Peripheral Modules for controlling the

desired operation of the device. These registers are

implemented as static RAM.

The special function registers can be classified into two

sets (core and peripheral). Those registers associated

with the “core” functions are described in this section,

and those related to the operation of the peripheral fea-

tures are described in the section of that peripheral fea-

ture.

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 all

other resets

Bank 0

00h

INDF

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

0000 0000 0000 0000

01h

TMR0

Timer0 module’s register

xxxx xxxx uuuu uuuu

02h

PCL

Program Counter's (PC) Least Significant Byte

0000 0000 0000 0000

03h

STATUS

IRP

RP1

RP0

TO

PD

Z

DC

C

0001 1xxx 000q quuu

04h

FSR

Indirect data memory address pointer

05h

PORTA

—

—

PORTA Data Latch when written: PORTA pins when read

xxxx xxxx uuuu uuuu

(4)

(4)

06h

PORTB PORTB Data Latch when written: PORTB pins when read

xxxx xxxx uuuu uuuu

07h

PORTC

—

—

PORTC Data Latch when written: PORTC pins when read

--xx xxxx --uu uuuu

08h

PORTD PORTD Data Latch when written: PORTD pins when read

0000 0000 0000 0000

09h

PORTE PORTE pins when read

0000 0000 0000 0000

0Ah

PCLATH

—

—

—

Write Buffer for the upper 5 bits of the Program Counter

---0 0000 ---0 0000

0Bh

INTCON

GIE

PEIE

T0IE

0Ch

PIR1

LCDIF

ADIF(2)

—

INTE

—

RBIE

SSPIF

T0IF

CCP1IF

INTF

TMR2IF

RBIF 0000 000x 0000 000u

TMR1IF 00-- 0000 00-- 0000

0Dh

—

Unimplemented

—

—

0Eh

TMR1L Holding register for the Least Significant Byte of the 16-bit TMR1 register

xxxx xxxx uuuu uuuu

0Fh

TMR1H Holding register for the Most Significant Byte of the 16-bit TMR1 register

xxxx xxxx uuuu uuuu

10h

T1CON

—

—

T1CKPS1 T1CKPS0 T1OSCEN T1SYNC TMR1CS TMR1ON --00 0000 --uu uuuu

11h

TMR2

Timer2 module’s register

0000 0000 0000 0000

12h

T2CON

—

TOUTPS3 TOUTPS2 TOUTPS1 TOUTPS0 TMR2ON T2CKPS1 T2CKPS0 -000 0000 -000 0000

13h

SSPBUF Synchronous Serial Port Receive Buffer/Transmit Register

xxxx xxxx uuuu uuuu

14h

SSPCON

WCOL SSPOV SSPEN

CKP

SSPM3 SSPM2 SSPM1 SSPM0 0000 0000 0000 0000

15h

CCPR1L Capture/Compare/PWM Register (LSB)

xxxx xxxx uuuu uuuu

16h

CCPR1H Capture/Compare/PWM Register (MSB)

xxxx xxxx uuuu uuuu

17h

CCP1CON

—

—

CCP1X CCP1Y CCP1M3 CCP1M2 CCP1M1 CCP1M0 --00 0000 --00 0000

18h

—

Unimplemented

—

—

19h

—

Unimplemented

—

—

1Ah

—

Unimplemented

—

—

1Bh

—

Unimplemented

—

—

1Ch

—

Unimplemented

—

—

1Dh

—

Unimplemented

1Eh(1) ADRES A/D Result Register

1Fh(1) ADCON0

ADCS1 ADCS0

CHS2

CHS1

CHS0 GO/DONE

(5)

ADON

—

—

xxxx xxxx uuuu uuuu

0000 0000 0000 0000

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

shaded locations are unimplemented, read as ‘0’.

Note 1: Registers ADRES, ADCON0, and ADCON1 are not implemented in the PIC16C923, read as '0'.

2: These bits are reserved on the PIC16C923, always maintain these bits clear.

3: These pixels do not display, but can be used as general purpose RAM.

4: PIC16C923 reset values for PORTA: --xx xxxx for a POR, and --uu uuuu for all other resets,

PIC16C924 reset values for PORTA: --0x 0000 when read.

5: Bit1 of ADCON0 is reserved on the PIC16C924, always maintain this bit clear.

© 1997 Microchip Technology Inc.

DS30444E - page 19

Share Link: