參數(shù)資料
型號(hào): UPD780021AYGC-XXX-8BS
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 8.38 MHz, MICROCONTROLLER, PQFP64
封裝: 14 X 14 MM, PLASTIC, LQFP-64
文件頁(yè)數(shù): 25/96頁(yè)
文件大小: 723K
代理商: UPD780021AYGC-XXX-8BS
31
PD780021A, 780022A, 780023A, 780024A, 780021AY, 780022AY, 780023AY, 780024AY
Data Sheet U14042EJ4V0DS
(2) Serial interface SIO3n
Serial interface SIO3n has one mode: 3-wire serial I/O mode.
3-wire serial I/O mode (fixed as MSB first)
This is an 8-bit data transfer mode using three lines: a serial clock line (SCK3n), serial output line (SO3n),
and serial input line (SI3n).
Since simultaneous transmit and receive operations are enabled in the 3-wire serial I/O mode, the
processing time for data transfer is reduced.
The first bit in 8-bit data in the serial transfer is fixed as MSB.
The 3-wire serial I/O mode is useful for connection to peripheral I/O devices, and display controllers, etc.,
that include a clocked serial interface.
Figure 5-10. Block Diagram of Serial Interface SIO3n
Remark
PD780024A Subseries: n = 0, 1
PD780024AY Subseries: n = 0
Internal bus
8
Serial clock
controller
Serial clock
counter
Interrupt request
signal generator
Selector
Serial I/O shift register
3n (SIO3n)
SI3n
SO3n
SCK3n
INTCSI3n
fX/23
fX/24
fX/25
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