ATmega128A Atmel Corporation, ATmega128A Datasheet - Page 333

• Manufacturer Part Number: ATmega128A
• Manufacturer: Atmel Corporation

Specifications of ATmega128A

• Flash (kbytes): 128 Kbytes
• Pin Count: 64
• Max. Operating Frequency: 16 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 16
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 53
• Ext Interrupts: 8
• Usb Speed: No
• Usb Interface: No
• Spi: 1
• Twi (i2c): 1
• Uart: 2
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 8
• Adc Resolution (bits): 10
• Adc Speed (ksps): 15
• Analog Comparators: 1
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 4
• Eeprom (bytes): 4096
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 2.7 to 5.5
• Operating Voltage (vcc): 2.7 to 5.5
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 4
• Output Compare Channels: 8
• Input Capture Channels: 2
• Pwm Channels: 7
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

Table 27-13. External Data Memory Characteristics, 2.7V - 5.5V, No Wait-state (Continued)
Notes:
Table 27-14. External Data Memory Characteristics, 2.7V - 5.5V, SRWn1 = 0, SRWn0 = 1
Table 27-15. External Data Memory Characteristics, 2.7V - 5.5V, SRWn1 = 1, SRWn0 = 0
8151H–AVR–02/11
3b
4
5
6
7
8
9
10
11
12
13
14
15
16
0
10
12
15
16
0
10
12
15
16
Symbol
t
t
t
t
t
t
t
t
t
t
t
t
t
t
Symbol
1/t
t
t
t
t
Symbol
1/t
t
t
t
t
LLAX_LD
AVLLC
AVRL
AVWL
LLWL
LLRL
DVRH
RLDV
RHDX
RLRH
DVWL
WHDX
DVWH
WLWH
RLDV
RLRH
DVWH
WLWH
RLDV
RLRH
DVWH
WLWH
1. This assumes 50% clock duty cycle. The half period is actually the high time of the external clock, XTAL1.
2. This assumes 50% clock duty cycle. The half period is actually the low time of the external clock, XTAL1.
CLCL
CLCL
Parameter
Address Hold after ALE Low,
read access
Address Valid C to ALE Low
Address Valid to RD Low
Address Valid to WR Low
ALE Low to WR Low
ALE Low to RD Low
Data Setup to RD High
Read Low to Data Valid
Data Hold After RD High
RD Pulse Width
Data Setup to WR Low
Data Hold After WR High
Data Valid to WR High
WR Pulse Width
Parameter
Oscillator Frequency
Read Low to Data Valid
RD Pulse Width
Data Valid to WR High
WR Pulse Width
Parameter
Oscillator Frequency
Read Low to Data Valid
RD Pulse Width
Data Valid to WR High
WR Pulse Width
Min
115
235
235
115
115
235
105
235
250
235
Min
485
500
485
Min
735
750
735
45
5
0
4MHz Oscillator
4MHz Oscillator
4MHz Oscillator
Max
Max
Max
130
130
190
440
690
0.5t
0.5t
0.5t
0.5t
1.0t
1.0t
1.0t
1.0t
1.0t
2.0t
2.0t
3.0t
3.0t
1.0t
2.0t
3.0t
CLCL
CLCL
CLCL
CLCL
Min
Min
Min
CLCL
CLCL
CLCL
CLCL
CLCL
CLCL
CLCL
CLCL
CLCL
0.0
0.0
45
5
0
Variable Oscillator
Variable Oscillator
Variable Oscillator
CLCL
CLCL
CLCL
-10
-10
-10
-20
-15
-15
-15
-15
-15
-15
-15
-15
-15
(1)
(2)
(2)
(1)
ATmega128A
0.5t
0.5t
1.0t
2.0t
3.0t
CLCL
CLCL
Max
Max
Max
CLCL
CLCL
CLCL
8
8
+5
+5
-60
-60
-60
(2)
(2)
ns
ns
MHz
MHz
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Unit
ns
ns
ns
ns
Unit
ns
ns
ns
ns
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