Hitachi C1422R Service Manual page 25

SAA5290 (Teletext) & SAA5288 (Non-teletext)
Microcontrollers
Note: The SAA5288 microcontroller used on non-teletext models does not perform the functions in the
shaded area.
Black
CVBS0,
Data Slicer
CVBS1
8051
Reset
CPU
IRef
Acquisition
Timing
16k x 8
ROM
data
addr
int
I²C
Timer/
Ctrs
Port 1
P1.0 – 1.7
Fig 8
Teletext
Acquisition
256 x 8
RAM
ADC
Port 0 Port 3
P3.0 – 3.4
P0.0 – 0.7
Block Diagram
25
Display
Page
Display
RAM
Timing
Text
Interface
PWM
Port 2
P2.0 – 2.7
R,G,B,
VDS,
COR
VSync
HSync
Frame
XtalIn
Osc
XtalOut
OscGnd