Atmel AVR AT90CAN128, Руководство пользователя

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371
7679H–CAN–08/08
AT90CAN32/64/128
Note: In SPI Programming mode the minimum SCK high/low period is:
- 2 t
CLCL
for f
CK
< 12 MHz
- 3 t
CLCL
for f
CK
>12 MHz
Figure 26-4. SPI Interface Timing Requirements (Master Mode)
Figure 26-5. SPI Interface Timing Requirements (Slave Mode)
13 Setup Slave 10
ns
14 Hold Slave t
ck
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 • t
ck
Table 26-4. SPI Timing Parameters (Continued)
Description Mode Min. Typ. Max.
MOSI
(Data Output)
SCK
(CPOL = 1)
MISO
(Data Input)
SCK
(CPOL = 0)
SS
MSB LSB
LSB MSB
...
...
6 1
2 2
3 4 5
8 7
MISO
(Data Output)
SCK
(CPOL = 1)
MOSI
(Data Input)
SCK
(CPOL = 0)
SS
MSB LSB
LSB MSB
...
...
10
11 11
12 13 14
17 15
9
X
16
18