參數(shù)資料
型號(hào)： PCA84C646
廠商： NXP Semiconductors N.V.
英文描述： Microcontrollers for TV tuning control and OSD applications(應(yīng)用于TV調(diào)頻和OSD的微控制器)
中文描述： 微控制器的控制和調(diào)整（應(yīng)用于電視調(diào)頻和OSD的微控制器應(yīng)用的電視OSD）
文件頁(yè)數(shù)： 3/72頁(yè)
文件大小： 564K
代理商： PCA84C646
1995 Jun 15
3
Philips Semiconductors
Preliminary specification
Microcontrollers for TV tuning
control and OSD applications
PCA84C646; PCA84C846
1
FEATURES
1.1
PCF84CXXXA kernel
8-bit CPU, ROM, RAM, I/O and derivative logic in one
package
Over 80 instructions
All instructions of 1 or 2 cycles
Quasi-bidirectional standard I/O port lines (P0, P1)
Configuration of I/O lines individually selected by mask
External interrupt INT/T0
2 direct testable inputs T0, T1
8-bit timer/event counter
Single level vectored interrupt: external (INT),
counter/timer, I
2
C-bus and VSYNC
Configuration of optimal on-chip oscillator
transconductance by mask
On-chip oscillator clock frequency: 1 to 10 MHz
Power-on-reset and low-voltage detector
Low standby voltage and current in Idle and Stop modes
Single power supply: 4.5 to 5.5 V
Operating temperature:
20 to +70
°
C.
1.2
VST and OSD derivative
6 kbytes (PCA84C646) or 8 kbytes (PCA84C846)
system ROM, 192 bytes system RAM
A multi-master I
2
C-bus interface
One 14-bit PWM output for VST
Three AFC inputs with 4-bit DAC and comparator
Four 6-bit PWM and four 7-bit PWM outputs
(DACs for analog controls)
Eight port lines with 10 mA LED drive
(at
≤
1.2 V) capability
Programmable active level polarities of VSYNC/HSYNC
Display RAM: 64
×
10-bit
Display character fonts: 64 (62 customized + 2 special
reserved codes)
Display starting position: 64 different positions by
software control, both vertical and horizontal
Character size: 4 different character sizes, line-by-line
basis, 1 dot = 1H/1V, 2H/2V, 3H/3V, 4H/4V. (H: OSD
clock period, V: number of horizontal scan line height)
Character matrix: 12
×
18 with no spacing between
characters
Foreground colours: 8, character-by-character basis
Background colours: 8, word-by-word basis. Available
when background is either in North-west shadowing,
Box shadowing and Frame shadowing mode
Background/shadowing modes: 4, No background,
North-west shadowing, Box shadowing, Frame
shadowing (raster blanking), frame basis
On-chip oscillator for On Screen Display (OSD) function
Character blinking rate: 1 : 1, 1 : 3, 3 : 1 (frequency:
1
16
,
1
32
,
1
64
or
1
128
of f
VSYNC
, programmable),
character basis
Display format: flexible display format by using Carriage
Return (CR) code
Spacing between lines: 4 different choices,
from 0, 4, 8 or 12 horizontal scan lines
Auto display character RAM address post increment
when writing data
On-chip Power-on-reset
VSYNC leading edge can generate interrupt
(programmable enable/disable by software)
8-bit counter triggered by external pulse input.
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