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ATMEGA16 데이터시트(PDF) 289 Page - ATMEL Corporation

부품명 ATMEGA16
상세설명  8-bit AVR Microcontroller with 16K Bytes In-System Programmable Flash
PDF  315 Pages
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제조업체  ATMEL [ATMEL Corporation]
홈페이지  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

ATMEGA16 데이터시트(HTML) 289 Page - ATMEL Corporation

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ATmega16(L)
2466E–AVR–10/02
5. This requirement applies to all ATmega16 Two-wire Serial Interface operation. Other
devices connected to the Two-wire Serial Bus need only obey the general fSCL
requirement.
6. The actual low period generated by the ATmega16 Two-wire Serial Interface is (1/f
SCL
- 2/fCK), thus fCK must be greater than 6 MHz for the low time requirement to be
strictly met at f
SCL = 100 kHz.
7. The actual low period generated by the ATmega16 Two-wire Serial Interface is (1/f
SCL
- 2/fCK), thus the low time requirement will not be strictly met for fSCL > 308 kHz when
f
CK = 8 MHz. Still, ATmega16 devices connected to the bus may communicate at full
speed (400 kHz) with other ATmega16 devices, as well as any other device with a
proper tLOW acceptance margin.
Figure 145. Two-wire Serial Bus Timing
SPI Timing
Characteristics
See Figure 146 and Figure 147 for details.
tSU;STA
tLOW
tHIGH
tLOW
tof
tHD;STA
tHD;DAT
tSU;DAT
tSU;STO
tBUF
SCL
SDA
tr
Table 120. SPI Timing Parameters
Description
Mode
Min
Typ
Max
1
SCK period
Master
See Table 58
ns
2
SCK high/low
Master
50% duty cycle
3
Rise/Fall time
Master
3.6
4
Setup
Master
10
5Hold
Master
10
6
Out to SCK
Master
0.5 • t
SCK
7
SCK to out
Master
10
8
SCK to out high
Master
10
9SS low to out
Slave
15
10
SCK period
Slave
4 • tck
11
SCK high/low
Slave
2 • tck
12
Rise/Fall time
Slave
1.6
µs
13
Setup
Slave
10
ns
14
Hold
Slave
10
15
SCK to out
Slave
15
16
SCK to SS high
Slave
20
17
SS high to tri-state
Slave
10
18
SS low to SCK
Slave
2 • tck



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