ATMEGA163 ATMEL [ATMEL Corporation], ATMEGA163 Datasheet - Page 17

• Manufacturer Part Number: ATMEGA163
• Description: 8-bit Microcontroller with 16K Bytes In-System Programmable Flash
• Manufacturer: ATMEL [ATMEL Corporation]

I/O Memory
1142E–AVR–02/03
Figure 22. Single Cycle ALU Operation
The internal data SRAM access is performed in two System Clock cycles as described
in Figure 23.
Figure 23. On-chip Data SRAM Access Cycles
The I/O space definition of the ATmega163 is shown in the following table:
Table 2. ATmega163 I/O Space
Register Operands Fetch
System Clock Ø
(SRAM Address)
ALU Operation Execute
I/O Address
Total Execution Time
$3D ($5D)
$3F ($5F)
$3E ($5E)
$3B ($5B)
$3A ($5A)
$39 ($59)
$38 ($58)
$37 ($57)
$36 ($56)
$35 ($55)
$34 ($54)
$33 ($53)
Result Write Back
System Clock Ø
Address
Data
Data
WR
RD
MCUCR
SPMCR
MCUSR
TCCR0
GIMSK
TIMSK
TWCR
SREG
Name
Prev. Address
GIFR
TIFR
SPH
SPL
T1
(1)
T1
Function
Status REGister
Stack Pointer High
Stack Pointer Low
General Interrupt MaSK Register
General Interrupt Flag Register
Timer/Counter Interrupt MaSK Register
Timer/Counter Interrupt Flag Register
SPM Control Register
Two-wire Serial Interface Control Register
MCU general Control Register
MCU general Status Register
Timer/Counter0 Control Register
Address
T2
T2
ATmega163(L)
T3
T3
T4
T4
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