PIC16C622-20/SS Microchip Technology, PIC16C622-20/SS Datasheet - Page 26
![IC MCU OTP 2KX14 COMP 20SSOP](/photos/6/58/65895/150-20-ssop_sml.jpg)
PIC16C622-20/SS
Manufacturer Part Number
PIC16C622-20/SS
Description
IC MCU OTP 2KX14 COMP 20SSOP
Manufacturer
Microchip Technology
Series
PIC® 16Cr
Specifications of PIC16C622-20/SS
Core Processor
PIC
Core Size
8-Bit
Speed
20MHz
Peripherals
Brown-out Detect/Reset, POR, WDT
Number Of I /o
13
Program Memory Size
3.5KB (2K x 14)
Program Memory Type
OTP
Ram Size
128 x 8
Voltage - Supply (vcc/vdd)
3 V ~ 6 V
Oscillator Type
External
Operating Temperature
0°C ~ 70°C
Package / Case
20-SSOP
For Use With
XLT20SS-1 - SOCKET TRANSITION 18DIP 20SSOPAC164307 - MODULE SKT FOR PM3 28SSOPISPICR1 - ADAPTER IN-CIRCUIT PROGRAMMINGAC164018 - MODULE SKT PROMATEII 20SSOP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
Data Converters
-
Connectivity
-
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PIC16C62X
4.4
The INDF register is not a physical register. Addressing
the INDF register will cause indirect addressing.
Indirect addressing is possible by using the INDF
register. Any instruction using the INDF register
actually accesses data pointed to by the File Select
Register (FSR). Reading INDF itself indirectly will
produce 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 4-9. However, IRP
is not used in the PIC16C62X.
A simple program to clear RAM location 20h-7Fh using
indirect addressing is shown in Example 4-1.
FIGURE 4-9:
DS30235J-page 24
RP1
bank select
RP0
Note 1: The RP1 and IRP bits are reserved; always maintain these bits clear.
For memory map detail see (Figure 4-4, Figure 4-5, Figure 4-6 and Figure 4-7).
Indirect Addressing, INDF and
FSR Registers
(1)
location select
6
Direct Addressing
Data
Memory
DIRECT/INDIRECT ADDRESSING PIC16C62X
from opcode
7Fh
00h
Bank 0
00
0
Bank 1
01
Bank 2
10
not used
EXAMPLE 4-1:
NEXT clrf
CONTINUE:
Bank 3
11
movlw
movwf
incf
btfss
goto
IRP
bank select
180h
1FFh
(1)
0x20
FSR
INDF
FSR
FSR,7
NEXT
7
Indirect Addressing
INDIRECT ADDRESSING
2003 Microchip Technology Inc.
;initialize pointer
;to RAM
;clear INDF register
;inc pointer
;all done?
;no clear next
;yes continue
FSR register
location select
0
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