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參數(shù)資料
| 型號： | ST6393B1 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | 8-BIT HCMOS MCUs FOR TV FREQUENCY SYNTHESIS WITH OSD |
| 中文描述： | 8位微控制器HCMOS電視頻率合成帶OSD |
| 文件頁數(shù)： | 30/68頁 |
| 文件大小： | 560K |
| 代理商： | ST6393B1 |
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PA7-PA0.
Thesearethe I/OportAdatabits.Reset
at power-on.
PB7-PB0.
These arethe I/OportBdatabits.Reset
at power-on.
PC7-PC0.
Set to 04h at power-on. Bit 2 (PC2 pin)
is set to one (open drain therefore high im-
pedence).
PA7-PA0.
These are the I/O port A data direction
bits. When a bit is cleared to zero the related I/O
line is in input mode, if bit is set to one the related
I/Oline is in output mode. Reset atpower-on.
PB7-PB0.
These are the I/O port B data direction
bits. When a bit is cleared to zero the related I/O
line is in input mode, if bit is set to one the related
I/Oline is in output mode. Reset atpower-on.
PC7-PC0.
These are the I/Oport C data direction
bits. When a bit is cleared to zero the related I/O
line is in input mode, if bit is set to one the related
I/Oline is in output mode. Set to 04h at power-on.
Bit 2 (PC2 pin) is set to one (output mode se-
lected).
DDR
DR
Mode
Option
0
0
Input
With on-chip pull-up
resistor
0
1
Input
Without on-chip pull-up resistor
1
X
Output
Open-drain orPush-Pull
Note
: X: Means don’tcare.
Table 8. I/O Port Options Selection
DRA, DRB, DRC
Port A, B, C Data Register
( C0hPA, C1h PB, C2h PCRead/ Write )
D7 D6 D5 D4 D3 D2 D1 D0
A0 -PA7 =Data Bits
PB0 -PB7 =Data Bits
PC0 - PC7 = Data Bits
Figure28. Port A, B, C Data Register
DDRA, DDRB,DDRC
Port A, B, CData Direction Register
( C4h PA, C5h PB, C6h PCRead/ Write )
D7 D6 D5 D4 D3 D2 D1 D0
PA0 -PA7 =Data DirectionBits
PB0 -PB7 =Data DirectionBits
PC0 -PC7 = Data DirectionBits
“0” Defines bitas Input
”1” Defines bitas Output
Figure 29. Port A, B, C Data Register
I/OPin Programming
Eachpincanbe individuallyprogrammed asinputor
outputwith differentinput andoutputconfigurations.
This is achieved by writing to the relevantbit in the
data (DR) and datadirection register (DDR). Table
8 shows all the port configurations that can be se-
lected by the user software.
INPUT/OUTPUT PORTS
(Continued)
ST6391,92,93,95,97,99
26/64
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