Rainbow-electronics ATmega32L Bedienungsanleitung PDF herunterladen (Seite 161)

161

ATmega32(L)

2503C–AVR–10/02

• Bit 5:4 – UPM1:0: Parity Mode

These bits enable and set type of parity generation and check. If enabled, the transmit-

ter will automatically generate and send the parity of the transmitted data bits within

each frame. The Receiver will generate a parity value for the incoming data and com-

pare it to the UPM0 setting. If a mismatch is detected, the PE flag in UCSRA will be set.

• Bit 3 – USBS: Stop Bit Select

This bit selects the number of Stop Bits to be inserted by the Transmitter. The Receiver

ignores this setting.

• Bit 2:1 – UCSZ1:0: Character Size

The UCSZ1:0 bits combined with the UCSZ2 bit in UCSRB sets the number of data bits

(Character Size) in a frame the Receiver and Transmitter use.

Table 64. UPM Bits Settings

UPM1 UPM0 Parity Mode

0 0 Disabled

01Reserved

1 0 Enabled, Even Parity

1 1 Enabled, Odd Parity

Table 65. USBS Bit Settings

USBS Stop Bit(s)

01-bit

12-bit

Table 66. UCSZ Bits Settings

UCSZ2 UCSZ1 UCSZ0 Character Size

0 0 0 5-bit

0 0 1 6-bit

0 1 0 7-bit

0 1 1 8-bit

100 Reserved

101 Reserved

110 Reserved

1 1 1 9-bit

1 2 ... 156 157 158 159 160 161 162 163 164 165 166 ... 312 313

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Rainbow-electronics ATmega32L Bedienungsanleitung Seite 161