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參數(shù)資料
| 型號： | T90FJR-5VTX |
| 廠商： | ATMEL CORP |
| 元件分類： | 消費(fèi)家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP128 |
| 封裝： | GREEN, PLASTIC, VQFP-128 |
| 文件頁數(shù)： | 17/42頁 |
| 文件大?。?/td> | 358K |
| 代理商： | T90FJR-5VTX |
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24
4152B–ASSP–09/05
A/T90FJR
8.5
Power Control Register
This register is used to control the power of the modules if the power switch is implemented
(optional, see application note). When the VCC bit is 0, no VCC is supposed to be applied to the
modules so all the outputs to the modules are in high impedance state. When VCC = 0, ADOE#
and DATOE# are also high to put the address and data buffers outputs in high impedance. This
implies that when no VCC switch is used, the VCC bit should anyway be set to enable the con-
trol signals to be applied to the modules.
8.5.1
Power control : (@18h)
8.5.1.1
VCC
module power supply switch control
changing this bit is only allowed when LOCK = 1
0
power off
1
power on
8.5.1.2
VCLVL
module VCC output pin active level
changing this bit is only allowed when LOCK = 0
0
VCC pin is active-low
1
VCC pin is active-high
8.5.1.3
VCDRV
module VCC output pin structure
changing this bit is only allowed when LOCK = 0
0
VCC buffer is open drain
1
VCC buffer is push-pull
VCDRV
VCLVL
X
VCC
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