Microchip Technology TSSOP20EV Data Sheet
MCP434X/436X
DS22233A-page 32
© 2009 Microchip Technology Inc.
4.2
Memory Map
The device memory is 16 locations that are 9-bits wide
(16x9 bits). This memory space contains both volatile
and non-volatile locations (see
(16x9 bits). This memory space contains both volatile
and non-volatile locations (see
).
TABLE 4-1:
MEMORY MAP AND THE SUPPORTED COMMANDS
Address
Function
Memory
Type
Allowed Commands
Disallowed Commands
(2)
Factory
Initialization
00h
Volatile Wiper 0
RAM
Read, Write,
Increment, Decrement
—
—
01h
Volatile Wiper 1
RAM
Read, Write,
Increment, Decrement
—
—
02h
Non-Volatile Wiper 0 EEPROM
Read, Write
Increment,
Decrement
8-bit
80h
7-bit
40h
03h
Non-Volatile Wiper 1 EEPROM
Read, Write
Increment,
Decrement
8-bit
80h
7-bit
40h
04h
Volatile
TCON0 Register
TCON0 Register
RAM
Read, Write
Increment, Decrement
—
05h
Status Register
RAM
Read
Write, Increment, Decrement
—
06h
Volatile Wiper 2
RAM
Read, Write,
Increment, Decrement
—
—
07h
Volatile Wiper 3
RAM
Read, Write,
Increment, Decrement
—
—
08h
Non-Volatile Wiper 2 EEPROM
Read, Write
Increment,
Decrement
8-bit
80h
7-bit
40h
09h
Non-Volatile Wiper 3 EEPROM
Read, Write
Increment,
Decrement
8-bit
80h
7-bit
40h
0Ah
Volatile
TCON1 Register
TCON1 Register
RAM
Read, Write
Increment, Decrement
—
0Bh
Data EEPROM
EEPROM
Read, Write
Increment,
Decrement
000h
0Ch
Data EEPROM
EEPROM
Read, Write
Increment,
Decrement
000h
0Dh
Data EEPROM
EEPROM
Read, Write
Increment,
Decrement
000h
0Eh
Data EEPROM
EEPROM
Read, Write
Increment,
Decrement
000h
0Fh
Data EEPROM
EEPROM
Read, Write
Increment,
Decrement
000h
Note 1:
When an EEPROM write is active, these are invalid commands and will generate an error condition. The
user should use a read of the Status register to determine when the write cycle has completed. To exit the
error condition, the user must take the CS pin to the V
user should use a read of the Status register to determine when the write cycle has completed. To exit the
error condition, the user must take the CS pin to the V
IH
level and then back to the active state (V
IL
or
V
IHH
).
2:
This command on this address will generate an error condition. To exit the error condition, the user must
take the CS pin to the V
take the CS pin to the V
IH
level and then back to the active state (V
IL
or V
IHH
).