Block Diagram Of Serial Interface Csia0 - NEC 78K0 User Manual

ATE0
DIR0
RXAE
Serial I/O shift
SIA0/P143
register 0 (SIOA0)
SOA0/P144
PM144
STB0/P145
PM145
P145
Serial transfer
BUSY0/P141
SCKA0/P142
PM142
P142
Automatic data
transfer interval
specification
register 0 (ADTI0)
6-bit counter
Figure 17-1. Block Diagram of Serial Interface CSIA0
Automatic data
transfer address
Buffer RAM
point specification
register 0 (ADTP0)
ATM0
TXAE
P144
Serial clock
counter
controller
Selector
f /6 to f
X
MASTER0
Automatic data
transfer address
count register 0
(ADTC0)
Internal bus
Serial trigger
register 0 (CSIT0)
Divisor selection
register 0
ATSTP0 ATSTA0
(BRGCA0)
2
*
Interrupt
INTACSI
generator
Baud rate
f
X
generator
/32
X
Serial status
register 0 (CSIS0)
STBE0 BUSYE0 BUSYLV0 ERRE0 ERRF0 TSF0
3
4