AT91SAM7S256D-AU Atmel, AT91SAM7S256D-AU Datasheet - Page 313
AT91SAM7S256D-AU
Manufacturer Part Number
AT91SAM7S256D-AU
Description
ARM Microcontrollers - MCU 256K Flash SRAM 64K ARM based MCU
Manufacturer
Atmel
Series
SAM7S256r
Datasheet
1.AT91SAM7S256D-AU.pdf
(775 pages)
Specifications of AT91SAM7S256D-AU
Rohs
yes
Core
ARM
Processor Series
AT91SAM
Data Bus Width
16 bit/32 bit
Maximum Clock Frequency
55 MHz
Program Memory Size
256 KB
Data Ram Size
64 KB
On-chip Adc
Yes
Operating Supply Voltage
3 V to 3.6 V
Operating Temperature Range
- 40 C to + 85 C
Package / Case
LQFP-64
Mounting Style
SMD/SMT
Interface Type
2-Wire, I2S, SPI, USART
Length
7 mm
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
AT91SAM7S256D-AU
Manufacturer:
ATMEL
Quantity:
101
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T
29.7.4
Register Name:
Access Type:
• CLDIV: Clock Low Divider
The SCL low period is defined as follows:
• CHDIV: Clock High Divider
The SCL high period is defined as follows:
T
• CKDIV: Clock Divider
The CKDIV is used to increase both SCL high and low periods.
low
high
=
=
31
23
15
(
–
–
7
(
(
CLDIV
(
CHDIV
TWI Clock Waveform Generator Register
×
×
2
CKDIV
2
CKDIV
30
22
14
TWI_CWGR
Read-write
–
–
6
)
+
)
+
3 )
3 )
×
×
T
MCK
T
MCK
29
21
13
–
–
5
28
20
12
–
–
4
CHDIV
CLDIV
27
19
11
–
–
3
26
18
10
–
2
SAM7S Series [DATASHEET]
CKDIV
6175M–ATARM–26-Oct-12
25
17
–
9
1
24
16
–
8
0
313
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