參數(shù)資料
型號: MQ80C52XXX-36/883
廠商: ATMEL CORP
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 36 MHz, MICROCONTROLLER, CQFP44
封裝: CERAMIC, QFP-44
文件頁數(shù): 140/152頁
文件大?。?/td> 2528K
代理商: MQ80C52XXX-36/883
86
8151H–AVR–02/11
ATmega128A
Table 12-21 and Table 12-22 relates the alternate functions of Port G to the overriding signals
12.4
Register Description
12.4.1
SFIOR - Special Function IO Register
Bit 2 – PUD: Pull-up disable
When this bit is written to one, the pull-ups in the I/O ports are disabled even if the DDxn and
PORTxn Registers are configured to enable the pull-ups ({DDxn, PORTxn} = 0b01). See “Con-
figuring the Pin” on page 66 for more details about this feature.
Table 12-21. Overriding Signals for Alternate Functions in PG4:PG1
Signal Name
PG4/TOSC1
PG3/TOSC2
PG2/ALE
PG1/RD
PUOE
AS0
SRE
PUOV
0
DDOE
AS0
SRE
DDOV
0
1
PVOE
0
SRE
PVOV
0
ALE
RD
DIEOE
AS0
0
DIEOV
0
DI
AIO
T/C0 OSC INPUT
T/C0 OSC OUTPUT
Table 12-22. Overriding Signals for Alternate Functions in PG0
Signal Name
PG0/WR
PUOE
SRE
PUOV
0
DDOE
SRE
DDOV
1
PVOE
SRE
PVOV
WR
DIEOE
0
DIEOV
0
DI
AIO
Bit
7
6
5
4
3
2
1
0
TSM
ACME
PUD
PSR0
PSR321
SFIOR
Read/Write
R/W
R
R/W
Initial Value
0
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