AT32UC3L064-D3HES ATMEL [ATMEL Corporation], AT32UC3L064-D3HES Datasheet - Page 491
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AT32UC3L064-D3HES
Manufacturer Part Number
AT32UC3L064-D3HES
Description
Manufacturer
ATMEL [ATMEL Corporation]
Datasheet
1.AT32UC3L064-D3HES.pdf
(830 pages)
- Current page: 491 of 830
- Download datasheet (11Mb)
22.9.3
Name:
Access Type:
Offset:
Reset Value:
• EXP: SMBus Timeout Clock prescaler
• THMAX: Clock High maximum cycles
• TLOWM: Master Clock stretch maximum cycles
• TLOWS: Slave Clock stretch maximum cycles
32099D–06/2010
31
23
15
7
Used to specify how to prescale the TIM and TLOWM counters in SMBTR. Counters are prescaled according to the following
formula
Clock cycles in clock high maximum count. Prescaled by SMBTR.EXP. Used for bus free detection. Used to time T
NOTE: Uses the prescaler specified by CWGR, NOT the prescaler specified by SMBTR.
Clock cycles in master maximum clock stretch count. Prescaled by SMBTR.EXP. Used to time T
Clock cycles in slave maximum clock stretch count. Prescaled by SMBTR.EXP. Used to time T
SMBus Timing Register (SMBTR)
f
prescaled SMBus
,
30
22
14
6
SMBTR
Read/Write
0x08
0x00000000
=
EXP
---------------------- -
2
(
f
EXP
clkpb
+
1
)
29
21
13
5
28
20
12
4
TLOWM
THMAX
TLOWS
27
19
11
3
-
26
18
10
2
-
AT32UC3L016/32/64
LOW:SEXT
LOW:MEXT
25
17
9
1
-
.
HIGH:MAX
24
16
8
0
-
.
491
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