ATMEGA161L-4PC Atmel, ATMEGA161L-4PC Datasheet - Page 85
ATMEGA161L-4PC
Manufacturer Part Number
ATMEGA161L-4PC
Description
IC AVR MCU 16K LV 4MHZ COM 40DIP
Manufacturer
Atmel
Series
AVR® ATmegar
Datasheet
1.ATMEGA161-8AC.pdf
(159 pages)
Specifications of ATMEGA161L-4PC
Core Processor
AVR
Core Size
8-Bit
Speed
4MHz
Connectivity
SPI, UART/USART
Peripherals
POR, PWM, WDT
Number Of I /o
35
Program Memory Size
16KB (8K x 16)
Program Memory Type
FLASH
Eeprom Size
512 x 8
Ram Size
1K x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Oscillator Type
External
Operating Temperature
0°C ~ 70°C
Package / Case
40-DIP (0.600", 15.24mm)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Data Converters
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1228D–AVR–02/07
• Bits 3..2 EMCUCR – SRW01, SRW00: Wait State Select Bits for Lower Page
The SRW01 and SRW00 bits control the number of wait states for the lower page of the
external memory address space (see Table 27).
Table 27. Wait States
Note:
For further details of the timing and wait states of the external memory interface, see
Figure 50 through Figure 53 for how the setting of the SRW bits affects the timing.
Table 28. Page Limits with Different Settings of SRL2..0
SRWn1
SRL2
0
0
1
1
0
0
0
0
1
1
1
1
1. n = 0 or 1 (lower/upper page)
SRWn0
0
1
0
1
SRL1
0
0
1
1
0
0
1
1
(1)
Wait States
No wait states
Wait one cycle during read/write strobe
Wait two cycles during read/write strobe
Wait two cycles during read/write and wait one cycle before driving
out new address
SRL0
0
1
0
1
0
1
0
1
Page Limits
Lower page = N/A
Upper page = $0460-$FFFF
Lower page = $0460-$1FFF
Upper page = $2000-$FFFF
Lower page = $0460-$4FFF
Upper page = $4000-$FFFF
Lower page = $0460-$5FFF
Upper page = $6000-$FFFF
Lower page = $0460-$7FFF
Upper page = $8000-$FFFF
Lower page = $0460-$9FFF
Upper page = $A000-$FFFF
Lower page = $0460-$BFFF
Upper page = $C000-$FFFF
Lower page = $0460-$DFFF
Upper page = $E000-$FFFF
ATmega161(L)
85
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