C8051F040DK Silicon Laboratories Inc, C8051F040DK Datasheet - Page 250
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C8051F040DK
Manufacturer Part Number
C8051F040DK
Description
DEV KIT FOR F040/F041/F042/F043
Manufacturer
Silicon Laboratories Inc
Type
MCUr
Specifications of C8051F040DK
Contents
Evaluation Board, Power Supply, USB Cables, Adapter and Documentation
Processor To Be Evaluated
C8051F04x
Interface Type
USB
Silicon Manufacturer
Silicon Labs
Core Architecture
8051
Silicon Core Number
C8051F040
Silicon Family Name
C8051F04x
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
For Use With/related Products
Silicon Laboratories C8051 F040, 041, 042, 043 MCUs
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
336-1205
Available stocks
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Manufacturer
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Company:
Part Number:
C8051F040DK
Manufacturer:
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C8051F040/1/2/3/4/5/6/7
19.4.5. Status Register
The SMB0STA Status register holds an 8-bit status code indicating the current state of the SMBus0 inter-
face. There are 28 possible SMBus0 states, each with a corresponding unique status code. The five most
significant bits of the status code vary while the three least-significant bits of a valid status code are fixed at
zero when SI = ‘1’. Therefore, all possible status codes are multiples of eight. This facilitates the use of sta-
tus codes in software as an index used to branch to appropriate service routines (allowing 8 bytes of code
to service the state or jump to a more extensive service routine).
For the purposes of user software, the contents of the SMB0STA register is only defined when the SI flag is
logic 1. Software should never write to the SMB0STA register; doing so will yield indeterminate results. The
28 SMBus0 states, along with their corresponding status codes, are given in Table 19.1.
250
Bits7-1:
Bit0:
SLV6
R/W
Bit7
SLV6-SLV0: SMBus0 Slave Address.
These bits are loaded with the 7-bit slave address to which SMBus0 will respond when oper-
ating as a slave transmitter or slave receiver. SLV6 is the most significant bit of the address
and corresponds to the first bit of the address byte received.
GC: General Call Address Enable.
This bit is used to enable general call address (0x00) recognition.
0: General call address is ignored.
1: General call address is recognized.
SLV5
R/W
Bit6
SFR Definition 19.4. SMB0ADR: SMBus0 Address
SLV4
R/W
Bit5
SLV3
R/W
Bit4
Rev. 1.5
SLV2
R/W
Bit3
SLV1
R/W
Bit2
SLV0
R/W
Bit1
SFR Address:
SFR Page:
R/W
GC
Bit0
0xC3
0
00000000
Reset Value
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