ATTINY88-15MZ Atmel, ATTINY88-15MZ Datasheet - Page 30

• Manufacturer Part Number: ATTINY88-15MZ
• Description: IC MCU AVR 8B 8KB FLASH 32QFN
• Manufacturer: Atmel
• Series: AVR® ATtinyr

Specifications of ATTINY88-15MZ

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: I²C, SPI
• Peripherals: Brown-out Detect/Reset, POR, WDT
• Number Of I /o: 28
• Program Memory Size: 8KB (4K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 64 x 8
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

6.5
30
External Clock
ATtiny88 Automotive
To drive the device from an external clock source, CLKI should be driven as shown in
on page
“00” (see
Table 6-7.
Figure 6-2.
When this clock source is selected, start-up times are determined by the SUT Fuses as shown in
Table
Table 6-8.
When applying an external clock, it is required to avoid sudden changes in the applied clock fre-
quency to ensure stable operation of the MCU. A variation in frequency of more than 2% from
one clock cycle to the next can lead to unpredictable behavior. If changes of more than 2% is
required, ensure that the MCU is kept in Reset during the changes.
Note that the System Clock Prescaler can be used to implement run-time changes of the internal
clock frequency while still ensuring stable operation. Refer to
31
for details.
SUT1..0
CKSEL1..0
00
01
10
11
6-8.
30. To run the device on an external clock, the CKSEL Fuses must be programmed to
00
Table
Selecting External Clock
External Clock Drive Configuration
Start-up Times for the External Clock Selection
Power Conditions
BOD enabled
Fast rising power
Slowly rising power
6-7).
EXTERNAL
SIGNAL
CLOCK
from Power-down
Start-up Time
Reserved
6 CK
6 CK
6 CK
0
Frequency
CLKI
GND
–
16 MHz
“System Clock Prescaler” on page
from Reset (V
Additional Delay
14CK + 64 ms
14CK + 4 ms
14CK
9157B–AVR–01/10
CC
Figure 6-2
= 5.0V)