Configuration Of Serial Interface 1A0; Block Diagram Of Serial Interface 1A0 - NEC PD789488 User Manual

12.2 Configuration of Serial Interface 1A0

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