PIC12F635T-I/MD Microchip Technology, PIC12F635T-I/MD Datasheet - Page 93
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PIC12F635T-I/MD
Manufacturer Part Number
PIC12F635T-I/MD
Description
1.75 KB Flash, 64 RAM, 6 I/O 8 DFN 4x4mm T/R
Manufacturer
Microchip Technology
Series
PIC® 12Fr
Specifications of PIC12F635T-I/MD
Core Processor
PIC
Core Size
8-Bit
Speed
20MHz
Peripherals
Brown-out Detect/Reset, POR, WDT
Number Of I /o
5
Program Memory Size
1.75KB (1K x 14)
Program Memory Type
FLASH
Eeprom Size
128 x 8
Ram Size
64 x 8
Voltage - Supply (vcc/vdd)
2 V ~ 5.5 V
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
8-DFN
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With
AC164326 - MODULA SKT PM3 20QFNXLT08DFN2 - SOCKET TRANSITION ICE 14DIP/8DFNXLT08DFN - SOCKET TRANSITION ICE 8DFN
Data Converters
-
Connectivity
-
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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9.0
The EEPROM data memory is readable and writable
during normal operation (full V
is not directly mapped in the register file space.
Instead, it is indirectly addressed through the Special
Function Registers. There are four SFRs used to read
and write this memory:
• EECON1
• EECON2 (not a physically implemented register)
• EEDAT
• EEADR
EEDAT holds the 8-bit data for read/write and EEADR
holds the address of the EEPROM location being
accessed. PIC16F636/639 has 256 bytes of data
EEPROM and the PIC12F635 has 128 bytes.
REGISTER 9-1:
REGISTER 9-2:
© 2007 Microchip Technology Inc.
bit 7
Legend:
R = Readable bit
-n = Value at POR
bit 7-0
bit 7
Legend:
R = Readable bit
-n = Value at POR
bit 7-0
Note 1:
EEADR7
EEDAT7
R/W-0
R/W-0
DATA EEPROM MEMORY
(1)
PIC16F636/639 only. Read as ‘0’ on PIC12F635.
EEDATn: Byte Value to Write To or Read From Data EEPROM bits
EEADR: Specifies One of 256 Locations for EEPROM Read/Write Operation bits
EEADR6
EEDAT6
R/W-0
R/W-0
EEDAT: EEPROM DATA REGISTER
EEADR: EEPROM ADDRESS REGISTER
DD
W = Writable bit
‘1’ = Bit is set
W = Writable bit
‘1’ = Bit is set
EEADR5
range). This memory
EEDAT5
R/W-0
R/W-0
EEADR4
EEDAT4
R/W-0
R/W-0
PIC12F635/PIC16F636/639
U = Unimplemented bit, read as ‘0’
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
‘0’ = Bit is cleared
EEADR3
EEDAT3
R/W-0
R/W-0
The EEPROM data memory allows byte read and write.
A byte write automatically erases the location and
writes the new data (erase before write). The EEPROM
data memory is rated for high erase/write cycles. The
write time is controlled by an on-chip timer. The write
time will vary with voltage and temperature as well as
from chip-to-chip. Please refer to A/C specifications in
Section 15.0 “Electrical Specifications” for exact
limits.
When the data memory is code-protected, the CPU
may continue to read and write the data EEPROM
memory. The device programmer can no longer access
the data EEPROM data and will read zeroes.
EEADR2
EEDAT2
R/W-0
R/W-0
x = Bit is unknown
x = Bit is unknown
EEADR1
EEDAT1
R/W-0
R/W-0
DS41232D-page 91
EEADR0
EEDAT0
R/W-0
R/W-0
bit 0
bit 0
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