參數(shù)資料
型號： KSZ8863RLL-EVAL
廠商： Micrel Inc
文件頁數(shù)： 59/106頁
文件大小： 0K
描述： BOARD EVALUATION FOR KSZ8863RLL
標(biāo)準(zhǔn)包裝： 1
主要目的： 接口，以太網(wǎng) PHY
嵌入式： 否
已用 IC / 零件： KSZ8863RLL
已供物品： 板
相關(guān)產(chǎn)品： 576-3752-ND - IC ETHERNET SWITCH 3PORT 48-LQFP
576-3578-ND - IC ETHERNET SW 3PORT 48-LQFP
其它名稱： 576-3868
PIC16C72 Series
1998 Microchip Technology Inc.
Preliminary
DS39016A-page 55
The ADRES register contains the result of the A/D con-
version. When the A/D conversion is complete, the
result is loaded into the ADRES register, the GO/DONE
bit (ADCON0<2>) is cleared, and A/D interrupt ag bit
ADIF is set. The block diagram of the A/D module is
shown in Figure 9-3.
The value that is in the ADRES register is not modied
for a Power-on Reset. The ADRES register will contain
unknown data after a Power-on Reset.
After the A/D module has been congured as desired,
the selected channel must be acquired before the con-
version is started. The analog input channels must
have their corresponding TRIS bits selected as an
input. To determine acquisition time, see Section 9.1.
After this acquisition time has elapsed the A/D conver-
sion can be started. The following steps should be fol-
lowed for doing an A/D conversion:
1.
Congure the A/D module:
Congure analog pins / voltage reference /
and digital I/O (ADCON1)
Select A/D input channel (ADCON0)
Select A/D conversion clock (ADCON0)
Turn on A/D module (ADCON0)
2.
Congure A/D interrupt (if desired):
Clear ADIF bit
Set ADIE bit
Set GIE bit
3.
Wait the required acquisition time.
4.
Start conversion:
Set GO/DONE bit (ADCON0)
5.
Wait for A/D conversion to complete, by either:
Polling for the GO/DONE bit to be cleared
OR
Waiting for the A/D interrupt
6.
Read A/D Result register (ADRES), clear bit
ADIF if required.
7.
For next conversion, go to step 1 or step 2 as
required. The A/D conversion time per bit is
dened as TAD. A minimum wait of 2TAD is
required before next acquisition starts.
FIGURE 9-3:
A/D BLOCK DIAGRAM
(Input voltage)
VAIN
VREF
(Reference
voltage)
VDD
PCFG2:PCFG0
CHS2:CHS0
000
or
010
or
100
001
or
011
or
101
RA5/AN4
RA3/AN3/VREF
RA2/AN2
RA1/AN1
RA0/AN0
100
011
010
001
000
A/D
Converter
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