Rainbow-electronics ATtiny26L Manual de usuario descargar pdf (Pagina 110)

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ATtiny26(L)

1477B–AVR–04/02

Note: 1. [XA1, XA0] = 0b11 is “No Action, Idle”. As long as XTAL1 is not pulsed, the Com-

mand, Address, and Data Registers remain unchanged. Therefore, there are no

problems using BS2 as described below even though BS2 is multiplexed with XA1.

BS2 is only asserted when reading the fuses (OE

is low) and XTAL1 is not pulsed.

Table 53. XA1 and XA0 Coding

(1)

XA1 XA0 Action when XTAL1 is Pulsed

Load Flash or EEPROM Address (High or low address byte determined by

BS1).

0 1 Load Data (High or Low data byte for Flash determined by BS1).

1 0 Load Command

1 1 No Action, Idle

Table 54. Command Byte Bit Coding

Command Byte Command Executed

1000 0000 Chip Erase

0100 0000 Write Fuse Bits

0010 0000 Write Lock Bits

0001 0000 Write Flash

0001 0001 Write EEPROM

0000 1000 Read Signature Bytes and Calibration Byte

0000 0100 Read Fuse and Lock Bits

0000 0010 Read Flash

0000 0011 Read EEPROM

Table 55. No. of Words in a Page and no. of Pages in the Flash

Flash Size Page Size PCWORD No. of Pages PCPAGE PCMSB

1K words (2K bytes) 16 words PC[3:0] 64 PC[9:4] 9

Table 56. No. of Words in a Page and no. of Pages in the EEPROM

EEPROM Size Page Size PCWORD No. of Pages PCPAGE EEAMSB

128 bytes 4 bytes EEA[1:0] 32 EEA[7:0] 7

1 2 ... 105 106 107 108 109 110 111 112 113 114 115 ... 150 151

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Rainbow-electronics ATtiny26L Manual de usuario Pagina 110