C8051T600DK Silicon Laboratories Inc, C8051T600DK Datasheet - Page 120

• Manufacturer Part Number: C8051T600DK
• Description: KIT DEV FOR C8051T60X MCU'S
• Manufacturer: Silicon Laboratories Inc
• Type: MCUr

Specifications of C8051T600DK

• Contents: Evaluation Board, Power Supply, USB Cables, Adapter and Documentation
• Processor To Be Evaluated: C8051T60x
• Interface Type: USB
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• For Use With/related Products: C8051T600, C8051T601, C8051T602, C8051T603, C8051T604, C8051T605
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 336-1404

C8051T600/1/2/3/4/5/6
23. 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 23.1.
120
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 23.1. 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. 1.2
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