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| 型号： | P83C366CBP |
| 厂商： | NXP SEMICONDUCTORS |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | Microcontrollers for PAL/SECAM TV with OSD and VST(带 OSD和 VST的在PAL/SECAM TV中应用的微控制器) |
| 中文描述： | 8-BIT, MROM, 12 MHz, MICROCONTROLLER, PDIP42 |
| 封装： | 0.600 INCH, PLASTIC, SDIP-42 |
| 文件页数： | 12/92页 |
| 文件大小： | 382K |
| 代理商： | P83C366CBP |
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1999 Mar 10
12
Philips Semiconductors
Product specification
Microcontrollers for PAL/SECAM TV
with OSD and VST
P8xCx66 family
7
I/O FACILITY
7.1
I/O ports
The SDIP42 package has 28 I/O lines treated as
28 individual addressable bits or as 3 parallel 8-bit
addressable ports (Ports 0, 1 and 5) and one 4-bit port
(Port 3).
When these 28 I/O lines are used as input ports, the
corresponding bits in SFRs P0, P1, P3 and P5 should be
set to a logic 1 to facilitate the external input signal.
Ports 1, 3 and 5 also perform the following alternative
functions.
Port 1.
Used for a number of special functions:
Provides the external interrupt inputs (INT0 and INT1)
Provides the 16-bit timer/counter inputs (T0 and T1)
Provides the I
2
C-bus data and clock signals (SDA and
SCL)
P1.0 and P1.7 can be used as external interrupt inputs.
Port 3
. Only 4 lines available for alternative functions:
7-bit PWM output (PWM7)
ADC inputs ADC0 to ADC2.
Port 5.
Provides the 14-bit PWM output (TPWM)
7-bit PWMs outputs (PWM0 to PWM6).
To enable the alternative functions of Ports 1, 3 and 5, the
port bit latch of its associated SFR must contain a logic 1.
Each port consists of a latch (SFRs P0, P1, P3 and P5), an
output driver and an input buffer.
7.2
Port configurations
1.
Open-drain quasi-bidirectional I/O with n-channel
pull-down (see Fig.6). Use as an output requires the
connection of an external pull-up resistor. Use as an
input requires to write a logic 1 to the port latch before
reading the port line.
Push-pull; gives drive capability of the output in both
polarities, see Fig.7.
2.
Fig.6 Open-drain port.
handbook, halfpage
MGK547
n
Q
from port latch
input data
read port pin
INPUT
BUFFER
I/O pin
Fig.7 Push-pull port.
handbook, halfpage
MGM679
p1
n
strong pull-up
+
5 V
Q
from port latch
output pin
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