Rainbow-electronics ATmega128RFA1 Manuale Utente Pagina 174

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174
8266A-MCU Wireless-12/09
ATmega128RFA1
12.6.13 DPDS0 – Port Driver Strength Register 0
Bit 7 6 5 4 3 2 1 0
NA ($136) PFDRV1
PFDRV0
PEDRV1
PEDRV0
PDDRV1
PDDRV0
PBDRV1
PBDRV0
DPDS0
Read/Write RW RW RW RW RW RW RW RW
Initial Value 0 0 0 0 0 0 0 0
The output driver strength can be set individually for each digital I/O port. The following
tables show output current levels for a typical supply voltage of DEVDD = 3.3V. Refer to
section "Electrical Characteristics" for details.
Bit 7:6 – PFDRV1:0 - Driver Strength Port F
Table 12-7 PFDRV Register Bits
Register Bits Value Description
0 2 mA
1 4 mA
2 6 mA
PFDRV1:0
3 8 mA
Bit 5:4 – PEDRV1:0 - Driver Strength Port E
Table 12-8 PEDRV Register Bits
Register Bits Value Description
0 2 mA
1 4 mA
2 6 mA
PEDRV1:0
3 8 mA
Bit 3:2 – PDDRV1:0 - Driver Strength Port D
Table 12-9 PDDRV Register Bits
Register Bits Value Description
0 2 mA
1 4 mA
2 6 mA
PDDRV1:0
3 8 mA
Bit 1:0 – PBDRV1:0 - Driver Strength Port B
Table 12-10 PBDRV Register Bits
Register Bits Value Description
0 2 mA
1 4 mA
2 6 mA
PBDRV1:0
3 8 mA
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