參數(shù)資料
型號(hào)： MCP25050-E/P
廠商： Microchip Technology
文件頁(yè)數(shù)： 11/66頁(yè)
文件大?。?/td> 0K
描述： IC I/O EXPANDER CAN 8B 14DIP
標(biāo)準(zhǔn)包裝： 30
接口： CAN
輸入/輸出數(shù)： 8
中斷輸出： 無(wú)
頻率 - 時(shí)鐘： 25MHz
電源電壓： 4.5 V ~ 5.5 V
工作溫度： -40°C ~ 125°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(chǔ)器，PWM
配用： DV250501-ND - KIT DEV CAN MCP250XX
其它名稱： MCP25050E/P
2007 Microchip Technology Inc.
DS21664D-page 19
MCP2502X/5X
3.0
USER REGISTERS
3.1
Description
The MCP2502X/5X allows the user to pre-program
registers pertaining to CAN module and device
configuration into non-volatile EPROM memory. In this
way, the device is initialized to a default state after
power-up. The user registers are transferred to SRAM
during the power-up sequence and many of the
registers are able to be accessed via the CAN bus once
the device establishes a connection with the bus.
Additionally, there are 16 user-defined registers that
can be used to store information about the part (e.g.,
serial number, node identifier, etc.). The registers are
summarized in Table 3-1.
Note 1: When transferred to RAM, the register
addresses are offset by 1Ch. Accessing
individual
registers
using
the
“Write
Register” or “Read Register command
requires use of the offset address. Also,
see
for
information
on
accessible registers not contained in user
EPROM.
2: Do not address locations outside of the
user memory map or unexpected results
may occur.
TABLE 3-1:
USER MEMORY MAP
Address
Name
Description
Address
Name
Description
00h
IOINTEN
Enable inputs for Transmit-On-Change
feature
1Bh
RXF0EID0
Acceptance Filter 0, Extended ID
LSB
01h
IOINTPO
Defines polarity for I/O or greater than/
less than operator for A/D Transmit-On-
Change inputs
1Ch
RXF1SIDH
Acceptance Filter 1, Standard ID
MSB
02h
GPLAT
General Purpose I/O (GPIO) Register
1Dh
RXF1SIDL
Acceptance Filter 1, Standard ID
LSB, Extended ID USB, and
Extended ID enable
03h
0xFF
Reserved
1Eh
RXF1EID8
Acceptance Filter 1, Extended ID
MSB
04h
OPTREG1
Configuration options, including GPIO
pull-up enable, clockout enable and
prescaler
1Fh
RXF1EID0
Acceptance Filter 1, Extended ID
LSB
05h
T1CON
PWM1 Timer Control Register; contains
enable bit, clock prescale and DC LSBs
20h
TXID0SIDH
Transmit Buffer 0, Standard ID MSB
06h
T2CON
PWM2 Timer Control Register; contains
enable bits, clock prescale and DC LSBs
21h
TXID0SIDL
Transmit Buffer 0, Standard ID LSB,
Extended ID USB, and Extended ID
enable
07h
PR1
PWM1 Period Register
22h
TXID0EID8
Transmit Buffer 0, Extended ID MSB
08h
PR2
PWM2 Period Register
23h
TXID0EID0
Transmit Buffer 0, Extended ID LSB
09h
PWM1DCH PWM1 Duty Cycle (DC) MSBs
24h
TXID1SIDH
Transmit Buffer 1, Standard ID MSB
0Ah
PWM2DCH PWM2 Duty Cycle (DC) MSBs
25h
TXID1SIDL
Transmit Buffer 1, Standard ID LSB,
Extended ID USB, and Extended ID
enable
0Bh
CNF1 3
CAN module register configures
synchronization jump width and baud rate
prescaler
26h
TXID1EID8
Transmit Buffer 1, Extended ID MSB
0Ch
CNF2 3
CAN module register configures
propagation segment, phase segment 1,
and determines number of sample points
27h
TXID1EID0
Transmit Buffer 1, Extended ID LSB
0Dh
CNF3 3
CAN module register configures phase
buffer segment 2, Sleep mode
28h
TXID2SIDH
Transmit Buffer 2, Standard ID MSB
Note
1:
GPDDR is mapped to 1Fh is SRAM and not offset by 1Ch.
2:
User memory (35h-44h) is not transferred to RAM on power-up and can only be accessed via “Read User Mem”
commands.
3:
Cannot be modified from initial programmed values.
4:
Unimplemented on MCP2502X devices and read 0x00 (exception, ADCON1 = 0x0F).
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