PIC12CE674-04E/P Microchip Technology, PIC12CE674-04E/P Datasheet - Page 23

• Manufacturer Part Number: PIC12CE674-04E/P
• Description: IC,MICROCONTROLLER,8-BIT,PIC CPU,CMOS,DIP,8PIN,PLASTIC
• Manufacturer: Microchip Technology
• Series: PIC® 12Cr

Specifications of PIC12CE674-04E/P

• Rohs Compliant: YES
• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 4MHz
• Peripherals: POR, WDT
• Number Of I /o: 5
• Program Memory Size: 3.5KB (2K x 14)
• Program Memory Type: OTP
• Eeprom Size: 16 x 8
• Ram Size: 128 x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 5.5 V
• Data Converters: A/D 4x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 8-DIP (0.300", 7.62mm)
• Processor Series: PIC12C
• Core: PIC
• Data Bus Width: 8 bit
• Data Ram Size: 128 B
• Maximum Clock Frequency: 4 MHz
• Number Of Programmable I/os: 5
• Number Of Timers: 8
• Maximum Operating Temperature: + 125 C
• Mounting Style: Through Hole
• 3rd Party Development Tools: 52715-96, 52716-328, 52717-734
• Development Tools By Supplier: ICE2000
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 8 bit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Connectivity: -
• Lead Free Status / Rohs Status: Details

4.5
The INDF Register is not a physical register. Address-
ing the INDF Register will cause indirect addressing.
Any instruction using the INDF register actually
accesses the register pointed to by the File Select Reg-
ister, FSR. Reading the INDF Register itself indirectly
(FSR = ’0’) will read 00h. Writing to the INDF Register
indirectly results in a no-operation (although status bits
may be affected). An effective 9-bit address is obtained
by concatenating the 8-bit FSR Register and the IRP bit
(STATUS<7>), as shown in Figure 4-4. However, IRP is
not used in the PIC12C67X.
A simple program to clear RAM locations 20h-2Fh
using indirect addressing is shown in Example 4-1.
FIGURE 4-4:
1999 Microchip Technology Inc.
RP1 RP0
bank select
For register file map detail see Figure 4-2.
Note 1: The RP1 and IRP bits are reserved; always maintain these bits clear.
Indirect Addressing, INDF and FSR
Registers
(1)
location select
6
Direct Addressing
DIRECT/INDIRECT ADDRESSING
Data
Memory
from opcode
7Fh
00h
Bank 0
00
0
Bank 1
01
Bank 2
10
not used
EXAMPLE 4-1:
NEXT
CONTINUE
Bank 3
11
movlw
movwf
clrf
incf
btfss
goto
:
IRP
bank select
180h
1FFh
(1)
0x20
FSR
INDF
FSR,F
FSR,4
NEXT
INDIRECT ADDRESSING
7
Indirect Addressing
PIC12C67X
;initialize pointer
;to RAM
;clear INDF register
;inc pointer
;all done?
;no clear next
;yes continue
FSR register
DS30561B-page 23
location select
0