Rainbow-electronics ATmega163L Manual do Utilizador descarregar pdf (Página 132)

ATmega163(L)

132

Notes: 1. t

WLRH

is valid for the Write EEPROM, Write Fuse Bits and Write Lock Bits commands.

2. t

WLRH_CE

is valid for the Chip Erase command.

3. t

WLRH_FLASH

is valid for the Write Flash command.

Serial Downloading

Both the Flash and EEPROM memory arrays can be programmed using the serial SPI bus while RESET is pulled to GND.

The serial interface consists of pins SCK, MOSI (input) and MISO (output). After RESET

is set low, the Programming

Enable instruction needs to be executed first before program/erase operations can be executed.

Table 58. Parallel Programming Characteristics, T

= 25°C ± 10%, V

= 5 V ± 10%

Symbol Parameter Min Typ Max Units

Programming Enable Voltage 11.5 12.5 V

Programming Enable Current 250 µA

DVXH

Data and Control Valid before XTAL1 High 67 ns

XHXL

XTAL1 Pulse Width High 67 ns

XLDX

Data and Control Hold after XTAL1 Low 67 ns

XLWL

XTAL1 Low to WR Low 67 ns

BVPH

BS1 Valid before PAGEL High 67 ns

PHPL

PAGEL Pulse Width High 67 ns

PLBX

BS1 Hold after PAGEL Low 67 ns

PLWL

PAGEL Low to WR Low 67 ns

BVWL

BS1 Valid to WR Low 67 ns

RHBX

BS1 Hold after RDY/BSY High 67 ns

WLWH

WR Pulse Width Low 67 ns

WLRL

WR Low to RDY/BSY Low 0 2.5 µs

WLRH

WR Low to RDY/BSY High

(1)

11.51.9ms

WLRH_CE

WR Low to RDY/BSY High for Chip Erase

(2)

16 23 30 ms

WLRH_FLASH

WR Low to RDY/BSY High for Write Flash

(3)

81215ms

XLOL

XTAL1 Low to OE Low 67 ns

OLDV

OE Low to DATA Valid 20 ns

OHDZ

OE High to DATA Tri-stated 20 ns

1 2 ... 127 128 129 130 131 132 133 134 135 136 137 ... 155 156

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