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| 型号： | P83C380 |
| 厂商： | NXP SEMICONDUCTORS |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | Microcontrollers for monitors with DDC interface, auto-sync detection and sync proc(带DDC接口，同步监测和同步处理的监视器微控制器) |
| 中文描述： | 8-BIT, MROM, 16 MHz, MICROCONTROLLER, PDIP42 |
| 封装： | 0.600 INCH, PLASTIC, SOT-270-1, SDIP-42 |
| 文件页数： | 22/84页 |
| 文件大小： | 420K |
| 代理商： | P83C380 |
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1997 Dec 12
22
Philips Semiconductors
Product specification
Microcontrollers for monitors with DDC
interface, auto-sync detection and sync proc.
P83Cx80; P87C380
10 INPUT/OUTPUT (I/O)
The P83C880 has three 8-bit ports. Ports 0 to 2 are the
same as in the 80C51, with the exception of the additional
functions of Port 1 and Port 2. Port 3 only contains 4 bits.
Port 3 also has alternative functions.
All ports are bidirectional. Pins of which the alternative
function is not used may be used as normal bidirectional
I/Os.
The use of Port 1, Port 2 and Port 3 pins as an alternative
function is carried out automatically by the P83C880
provided the associated Special Function Register bit is
set HIGH.
The quasi-bidirectional type of port is applied for Port 1,
Port 2 and Port 3. Port 0 is an open-drain I/O port with the
capability to drive LED. However, for any port with an
alternative function, while the alternative function is
performed, the port type will be switched to the appropriate
type against a specific function. The port types:
quasi-bidirectional, pull-up and open-drain are shown in
Figs 7, 8 and 9 respectively.
10.1
The alternative functions for Port 0, Port 1,
Port 2 and Port 3
Port 0 Provides the low-order address in
programming/verify mode for the P87C380.
Port 1 Used for a number of special functions:
2 I/O pins for I
2
C-bus interface: SCL/P1.0 and
SDA/P1.1. The port type in this situation is set as
open-drain.
2 I/O pins for DDC interface: SCL1/P1.2 and
SDA1/P1.3. The port type in this situation is set
as open-drain.
2 I/O pins for the outputs of sync separation:
VSYNC
out
/P1.4 and HSYNC
out
/P1.5. The port
type in this situation is set as push-pull.
One pin for the composite sync input of sync on
green mode: CSYNC
in
/P1.6. There is no pull-up
protection diode for this input pin.
One pin for the 14-bit PWM output:
PWM10/P1.7. As PWM function, the port type is
open-drain.
Port 2 Two alternative functions are provided:
High-order address in Programming/Verify mode
for P87C380.
8 channels of PWM outputs:
PWM0/P2.0 to P2.7/PWM7. The port type in this
situation is set as open-drain.
Port 3 Two alternative functions are provided:
Two channels of PWM output:
PWM8/CLAMP/P3.0 and PWM9/PATOUT/P3.1.
The port type in this situation is set as
open-drain. PATOUT and CLAMP functions
always override PWM or port function even if
they are enabled. For the PATOUT (pattern
output) and CLAMP (clamping output)
application, the port type is defined as push-pull.
Two pins for the software ADC input: ADC0/P3.2
and ADC1/P3.3. They are analog inputs.
10.2
EMI (Electromagnetic Interference) reduction
In order to reduce EMI (Electromagnetic Interference) the
following design measures have been taken:
Slope control is implemented on all the I/O lines with
alternative functions of the PWM, I
2
C-bus and DDC
interface. For port pins P1.4 and P1.5, since the
alternative functions VSYNC
out
and HSYNC
out
are
incorporated, the driving capability is made as small as
possible to reduce radiation and the slope control
function is disabled to have a sharp output. Rise and fall
time (10% to 90%) for slope control are:
t
rf(min)
< rise/fall time < t
rf(max)
.
Refer to Chapter 27 for the detailed figures.
Placing the V
DD
and V
SS
pins next to each other
Double bonding of the V
DD
and V
SS
pins,
i.e. 2 bondpads for each pin
Limiting the drive capability of clock drivers and
prechargers
Applying slew rate controlled output drivers
Internal decoupling of the supply of the CPU core.
相关PDF资料 |
PDF描述 |
|---|---|
| P87C380 | Microcontrollers for monitors with DDC interface, auto-sync detection and sync proc(带DDC接口，同步监测和同步处理的监视器微控制器) |
| P83C880 | Microcontrollers for monitors with DDC interface, auto-sync detection and sync proc(带DDC接口，同步监测和同步处理的监视器微控制器) |
| P83C180 | Microcontrollers for monitors with DDC interface, auto-sync detection and sync proc(带DDC接口，同步监测和同步处理的监视器微控制器) |
| P83C370AAR | 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) |
| P83C570AAR | Microcontrollers for NTSC TVs with On-Screen Display OSD and Closed Caption CC |
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参数描述 |
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| P83C453EFAA | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:CMOS single-chip 8-bit microcontrollers |
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