AT91SAM7SE256-CU 데이터 시트보기 (PDF) - Atmel Corporation

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AT91SAM7SE256-CU

Product Description

Atmel Corporation 

6.5 SDCK Pin

The SDCK pin is dedicated to the SDRAM Clock and is an output-only without pull-up. Maximum

Output Frequency of this pad is 48 MHz at 3.0V and 25 MHz at 1.65V with a maximum load of

30 pF.

6.6 PIO Controller lines

All the I/O lines PA0 to PA31, PB0 to PB31, PC0 to PC23 integrate a programmable pull-up

resistor. Programming of this pull-up resistor is performed independently for each I/O line

through the PIO controllers.

Typical pull-up value is 100 kΩ.

All the I/O lines have schmitt trigger inputs.

6.7 I/O Lines Current Drawing

The PIO lines PA0 to PA3 are high-drive current capable. Each of these I/O lines can drive up to

16 mA permanently.

The remaining I/O lines can draw only 8 mA.

However, the total current drawn by all the I/O lines cannot exceed 300 mA.

16 AT91SAM7SE512/256/32 Preliminary

6222ES–ATARM–15-Dec-09

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