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NEC PD78F9488 Manuale Utente

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CHAPTER  12   SERIAL  INTERFACE  1A0 
 
 
User’s Manual  U15331EJ4V1UD 
217 
12.2  Configuration of Serial Interface 1A0 
Serial interface 1A0 includes the following hardware. 
 
Table 12-1.  Configuration of Serial Interface 1A0 
Item Configuration 
Registers 
Serial I/O shift register 1A0 (SIO1A0) 
Automatic data transmit/receive address pointer 0 (ADTP0) 
Control registers 
Serial operation mode register 1A0 (CSIM1A0) 
Automatic data transmit/receive control register 0 (ADTC0) 
Automatic data transmit/receive interval specification register 0 (ADTI0) 
Port mode register 2 (PM2) 
Port 2 (P2) 
 
Figure 12-1.  Block Diagram of Serial Interface 1A0 
 
 
 
RE0
ARLD
0
TRF0
Internal bus
Automatic data
transmit/receive
control register 0
(ADTC0)
Serial operation
mode register 1A0
(CSIM1A0)
ADTI
07
ADTI
04
ADTI
03
ADTI
02
ADTI
01
ADTI
00
5-bit counter 
Serial I/O shift
register 1A0
(SIO1A0)
Hand
shake
Serial clock
counter
Selector
SO10/
P24
PM24
P24 output
latch
DIR
10
DIR
10
Buffer RAM
Automatic data
transmit/receive
address pointer 0
(ADTP0)
PM23
TRF0
P23 output
latch
Match
ADTI00 to ADTI04
INTCSI10
Clear
f
SCK
SIO1A0 write
Q
R
S
Selector
ARLD0
CSIE
10
DIR
10
ATE0
SCL
101
SCL
100
ATE0
SI10/
P25
Automatic data
transmit/receive
interval specification
register 0 (ADTI0)
/2
2
f
X
/2
3
f
X
/2
4
f
X
SCK10/
P23
LSCK
10
Selector
LSCK
10
CSIE10