C8051T610DK Silicon Laboratories Inc, C8051T610DK Datasheet - Page 132
C8051T610DK
Manufacturer Part Number
C8051T610DK
Description
KIT DEV FOR C8051T61X MCU'S
Manufacturer
Silicon Laboratories Inc
Type
MCUr
Specifications of C8051T610DK
Contents
Board, daughter boards, power adapter, cables, documentation and software
Processor To Be Evaluated
C8051T61x
Interface Type
USB
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With/related Products
C8051T610
For Use With
336-1507 - DAUGHTER BOARD T610 24QFN SOCKET336-1506 - DAUGHTER BOARD T610 28QFN SOCKET336-1505 - DAUGHT BOARD T610 32TQFP SOCKET
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
336-1443
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C8051T610/1/2/3/4/5/6/7
22. SMBus
The SMBus I/O interface is a two-wire, bi-directional serial bus. The SMBus is compliant with the System
Management Bus Specification, version 1.1, and compatible with the I
the interface by the system controller are byte oriented with the SMBus interface autonomously controlling
the serial transfer of the data. Data can be transferred at up to 1/20th of the system clock as a master or
slave (this can be faster than allowed by the SMBus specification, depending on the system clock used). A
method of extending the clock-low duration is available to accommodate devices with different speed
capabilities on the same bus.
The SMBus interface may operate as a master and/or slave, and may function on a bus with multiple mas-
ters. The SMBus provides control of SDA (serial data), SCL (serial clock) generation and synchronization,
arbitration logic, and START/STOP control and generation. A block diagram of the SMBus peripheral and
the associated SFRs is shown in Figure 22.1.
132
M
A
S
T
E
R
Interrupt
Request
M
O
T
X
D
E
SMB0CN
S
T
A
S
O
T
Q
A
C
K
R
R
O
A
B
L
S
T
A
C
K
S
I
IRQ Generation
Arbitration
SCL Synchronization
SCL Generation (Master Mode)
SDA Control
SMBUS CONTROL LOGIC
Figure 22.1. SMBus Block Diagram
M
E
N
S
B
N
H
I
SMB0CF
B
U
S
Y
O
E
X
T
H
D
L
M
O
S
B
T
E
M
S
B
E
F
T
M
S
B
C
S
1
7
M
C
S
B
S
0
6
Data Path
SMB0DAT
5
Control
4
3
Rev 1.0
2
1
0
00
01
10
11
Control
SDA
Control
SCL
T0 Overflow
T1 Overflow
TMR2H Overflow
TMR2L Overflow
FILTER
FILTER
2
N
N
C serial bus. Reads and writes to
SDA
SCL
C
R
O
R
S
S
B
A
Port I/O
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