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PIC18F2420 Datasheet(PDF) 1 Page - Microchip Technology |
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PIC18F2420 Datasheet(HTML) 1 Page - Microchip Technology |
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© 2005 Microchip Technology Inc. DS80209D-page 1 PIC18F2420/2520/4420/4520 The PIC18F2420/2520/4420/4520 Rev. A1 parts you have received conform functionally to the Device Data Sheet (DS39631), except for the anomalies described below. Any Data Sheet Clarification issues related to the PIC18F2420/2520/4420/4520 will be reported in a separate Data Sheet errata. Please check the Microchip web site for any existing issues. All the problems listed here will be addressed in future revisions of the PIC18F2420/2520/4420/4520 silicon. The following silicon errata apply only to PIC18F2420/2520/4420/4520 devices with these Device/Revision IDs: 1. Module: MSSP In its current implementation, the I2C™ Master mode operates as follows: a) The Baud Rate Generator for I2C in Master mode is slower than the rates specified in Table 17-3 of the Device Data Sheet. For this revision of silicon, use the values shown in Table 1 in place of those shown in Table 17-3 of the Device Data Sheet. The differences are shown in bold text. b) Use the following formula in place of the one shown in Register 17-4 (SSPCON1) of the Device Data Sheet for bit description SSPM3:SSPM0 = 1000. SSPADD = INT((FCY/FSCL) – (FCY/1.111 MHz)) – 1 Date Codes that pertain to this issue: All engineering and production devices. TABLE 1: I2C™ CLOCK RATE w/BRG Part Number Device ID Revision ID PIC18F2420 01 0001 010 00001 PIC18F2520 01 0001 000 00001 PIC18F4420 01 0000 110 00001 PIC18F4520 01 0000 100 00001 The Device IDs (DEVID1 and DEVID2) are located at addresses 3FFFFEh:3FFFFFh in the device’s configuration space. They are shown in hexadecimal in the format “DEVID2 DEVID1”. FOSC FCY FCY * 2 BRG Value FSCL (2 Rollovers of BRG) 40 MHz 10 MHz 20 MHz 0Eh 400 kHz(1) 40 MHz 10 MHz 20 MHz 15h 312.5 kHz 40 MHz 10 MHz 20 MHz 59h 100 kHz 16 MHz 4 MHz 8 MHz 05h 400 kHz(1) 16 MHz 4 MHz 8 MHz 08h 308 kHz 16 MHz 4 MHz 8 MHz 23h 100 kHz 4 MHz 1 MHz 2 MHz 01h 333 kHz(1) 4 MHz 1 MHz 2 MHz 08h 100 kHz 4 MHz 1 MHz 2 MHz 00h 1 MHz(1) Note 1: The I2C™ interface does not conform to the 400 kHz I2C specification (which applies to rates greater than 100 kHz) in all details, but may be used with care where higher rates are required by the application. PIC18F2420/2520/4420/4520 Rev. A1 Silicon Errata Sheet |
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