PIC16C54B-20I/SS Microchip Technology, PIC16C54B-20I/SS Datasheet - Page 19

• Manufacturer Part Number: PIC16C54B-20I/SS
• Description: MICRO CTRL 512 20MHZ OTP 20SSOP
• Manufacturer: Microchip Technology
• Series: PIC® 16Cr

Specifications of PIC16C54B-20I/SS

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 20MHz
• Peripherals: POR, WDT
• Number Of I /o: 12
• Program Memory Size: 768B (512 x 12)
• Program Memory Type: OTP
• Ram Size: 25 x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 5.5 V
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 20-SSOP
• Lead Free Status / RoHS Status: Request inventory verification / Request inventory verification
• Eeprom Size: -
• Data Converters: -
• Connectivity: -

4.2.2
The Special Function Registers are registers used by
the CPU and peripheral functions to control the
operation of the device (Table 4-1).
TABLE 4-1:
N/A
N/A
00h
01h
02h
03h
04h
05h
06h
07h
Legend: Shaded boxes = unimplemented or unused, – = unimplemented, read as '0' (if applicable)
Note 1: The upper byte of the Program Counter is not directly accessible. See Section 4.5
Address
1998 Microchip Technology Inc.
(1)
(2)
2: File address 07h is a general purpose register on the PIC16C52, PIC16C54s, PIC16CR54s, PIC16C56s, PIC16CR56s,
SPECIAL FUNCTION REGISTERS
x = unknown, u = unchanged, q = see the tables in Section 7.7 for possible values.
for an explanation of how to access these bits.
PIC16C58s and PIC16CR58s.
TRIS
OPTION
INDF
TMR0
PCL
STATUS
FSR
PORTA
PORTB
PORTC
Name
SPECIAL FUNCTION REGISTER SUMMARY
I/O control registers (TRISA, TRISB, TRISC)
Contains control bits to configure Timer0 and Timer0/WDT prescaler
Uses contents of FSR to address data memory (not a physical register)
8-bit real-time clock/counter
Low order 8 bits of PC
Indirect data memory address pointer
Bit 7
RC7
RB7
PA2
—
Bit 6
RC6
RB6
PA1
—
Bit 5
RB5
RC5
PA0
—
Preliminary
Bit 4
RB4
RC4
TO
—
Bit 3
RC3
RA3
RB3
PD
The special registers can be classified into two sets.
The special function registers associated with the
“core” functions are described in this section. Those
related to the operation of the peripheral features are
described in the section for each peripheral feature.
Bit 2
RA2
RB2
RC2
Z
Bit 1
RA1
RB1
RC1
DC
Bit 0
RC0
RA0
RB0
C
PIC16C5X
1111 1111
--11 1111
xxxx xxxx
xxxx xxxx
1111 1111
0001 1xxx
1xxx xxxx
---- xxxx
xxxx xxxx
xxxx xxxx
Power-On
Value on
Reset
DS30453B-page 19
1111 1111
--11 1111
uuuu uuuu
uuuu uuuu
1111 1111
000q quuu
1uuu uuuu
---- uuuu
uuuu uuuu
uuuu uuuu
WDT Reset
MCLR and
Value on