參數(shù)資料
型號： MCP25055-I/P
廠商： Microchip Technology
文件頁數(shù)： 21/66頁
文件大小： 0K
描述： IC I/O EXPANDER CAN 8B 14DIP
標(biāo)準(zhǔn)包裝： 30
接口： 1 線，CAN
輸入/輸出數(shù)： 8
中斷輸出： 無
頻率 - 時(shí)鐘： 4MHz
電源電壓： 2.7 V ~ 5.5 V
工作溫度： -40°C ~ 85°C
安裝類型： 通孔
封裝/外殼： 14-DIP（0.300"，7.62mm）
供應(yīng)商設(shè)備封裝： 14-PDIP
包裝： 管件
包括： ADC，存儲器，PWM
產(chǎn)品目錄頁面： 685 (CN2011-ZH PDF)
配用： DV250501-ND - KIT DEV CAN MCP250XX
其它名稱： MCP25055I/P
MCP2502X/5X
DS21664D-page 28
2007 Microchip Technology Inc.
If
the
Error
Condition
message
is
enabled
(OPTREG2.TXONE = 1) and one of the above
conditions occur, the MCP2502X/5X sends TXID1
identifier with output message Read CAN Error States
data field (three data bytes).
4.5.4
SCHEDULED TRANSMISSIONS
The MCP2502X/5X has the capability of sending
scheduled
transmissions
(On
Bus
message),
if
enabled.
The scheduled transmission control register (STCON)
enables
and
configures
the
occurrence
of
the
scheduled message. Setting the STEN bit in the
STCON register enables the scheduled message. The
STBF1:STBF0 and STM3:STM0 bits allow a scheduled
transmission to be initiated from a minimum of 256 s
to a maximum of 16.8 seconds (using a 16 MHz FOSC)
and the following equation:
Message Type - The message sent for scheduled
transmissions consists of either TXID0 with zero data
bytes or TXID0 with eight data bytes containing the
Read A/D Regs message, depending on STMS bit in
the STCON register.
REGISTER 4-1:
STCON - SCHEDULED TRANSMISSION CONTROL REGISTER
Note:
The
actual
scheduled
transmission
intervals may vary slightly due to the
internal event que of the control module.
Scheduled Transmission
= STBF1:STBF0(STM3:STM0)
R/W-0
R/W-1
STEN
STMS
STBF1
STBF0
STM3
STM2
STM1
STM0
bit 7
bit 0
bit 7
STEN: Scheduled Transmission Enable bits
1
= Enabled
0
=Disabled
bit 6
STMS: Scheduled Transmission Message Select
1
= Sends Transmit ID 0 (TXID0) with the “Read A/D Regs” data (DLC = 8)
0
= Sends Transmit ID 0 (TXID0) with no data (DLC = 0)
bit 5-4
STBF1:STBF0: Base Transmission Frequency bits
00
= 4096TOSC
01
= 16
(4096TOSC)
10
= 256
(4096TOSC)
10
= 4096
(4096TOSC)
(e.g., STBF1:STBF0 => 00 => 256 s for a 16 MHz FOSC)
bit 3-0
STM3:STM0: Scheduled Transmission Multiplier bits
0000
= 1
0001
= 2
-
1110
= 15
1111
= 16
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
- n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
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