p87c770 ETC-unknow, p87c770 Datasheet - Page 15

• Manufacturer Part Number: p87c770
• Description: Microcontrollers Ntsc With On-screen Display Closed Caption
• Manufacturer: ETC-unknow

Philips Semiconductors
10 I
10.1
This serial port supports the twin line I
consists of a serial data line (SDA) and a serial clock line
(SCL). These lines also function as I/O port lines
P3.5 and P3.4 respectively.
The system is unique because data transport, clock
generation, address recognition and bus control arbitration
are all controlled by hardware.
Full details of the I
“The I
ordered using the code 9398 393 40011.
1999 Jun 11
handbook, full pagewidth
Microcontrollers for NTSC TVs with On-Screen
Display (OSD) and Closed Caption (CC)
2
C-BUS SERIAL I/O
2
C-bus and how to use it” . This document may be
The I
2
C-bus
2
C-bus are given in the document
SDA
SCL
Fig.6 Block diagram of the I
ARBITRATION LOGIC
2
C-bus. The I
S1CON
S1STA
7
7
2
C-bus
6
6
5
5
BUS CLOCK GENERATOR
15
S1ADR
SLAVE ADDRESS
4
4
10.2
The I
handling and operates in four modes.
These functions are controlled by the S1CON register.
S1STA is the Status Register whose contents may also be
used as a vector to various service routines. S1DAT is the
Data Shift Register and S1ADR the Slave Address
Register. Slave address recognition is performed by
hardware.
S1DAT
Master transmitter
Master receiver
Slave transmitter
Slave receiver.
SHIFT REGISTER
2
3
3
C-bus serial I/O.
2
C-bus serial I/O has complete autonomy in byte
Operation modes
2
2
1
1
MBC749 - 1
GC
0
0
P8xCx70 family
Product specification