MCP25020-I/P Просмотр технического описания (PDF) - Microchip Technology
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MCP25020-I/P Datasheet PDF : 66 Pages
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MCP2502X/5X
1.0 DEVICE OVERVIEW
This document contains device-specific information on
the MCP2502X/5X family of CAN I/O expanders. The
CAN protocol is not discussed in depth in this
document. Additional information on the CAN protocol
can be found in the CAN specification, as defined by
Robert Bosch GmbH.
Figure 1-1 is the block diagram of the MCP2502X/5X
and Table 1-1 is the pinout description.
The following sections detail the modules as listed in
Figure 1-1.
FIGURE 1-1:
MCP2502X/5X BLOCK DIAGRAM
GPIO
GP0/AN0
GP1/AN1
GP2/AN2/PWM1
GP3/AN3/PWM2
GP4/VREF-
GP5/VREF+
User
Memory
OSC1/CLKIN
OSC2/CLKOUT
Timing
Generation
State Machine
and
Control Logic
GP6/CLKOUT
GP7RST/VPP
CAN
Protocol
Engine
TXCAN/
TXRXCAN
RXCAN
PWM2
PWM1
* Only the MCP2505X devices have the A/D module.
A/D *
TABLE 1-1: PINOUT DESCRIPTION
Pin
Name
GP0/AN0 *
GP1/AN1 *
GP2/AN2/PWM2 *
GP3/AN3/PWM3 *
GP4/VREF-
GP5/VREF+
VSS
OSC1/CLKIN
OSC2
GP6/CLKOUT
GP7/RST/VPP
RXCAN
TXCAN/TXRXCAN
Pin
Number
1
2
3
4
5
6
7
8
9
10
11
12
13
Standard
Function
Bidirectional I/O pin, TTL input buffer
Bidirectional I/O pin, TTL input buffer
Bidirectional I/O pin, TTL input buffer
Bidirectional I/O pin, TTL input buffer
Bidirectional I/O pin, TTL input buffer
Bidirectional I/O pin, TTL input buffer
Ground
External oscillator input
External oscillator output
Bidirectional I/O pin, TTL input buffer
Input pin, TTL input buffer
CAN data receive input
CAN data transmit output
VDD
14
Power
* Only the MCP2505X devices have the A/D module.
Alternate
Function
Analog input channel
Analog input channel
Analog input/PWM output
Analog input/PWM output
External VREF-
External VREF input
None
External clock input
None
CLKOUT output
External Reset input
Not connected for 1-wire
CAN TX and RX for 1-wire
operation (MCP250X5)
None
Programming
Mode Function
None
None
None
None
Data
Clock
Ground
None
None
None
Vpp
None
None
Power
© 2007 Microchip Technology Inc.
DS21664D-page 3
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