upd75212a Renesas Electronics Corporation., upd75212a Datasheet - Page 24

• Manufacturer Part Number: upd75212a
• Description: 4-bit Single-chip Microcomputer
• Manufacturer: Renesas Electronics Corporation.

P01/SCK
P02/SO
P03/SI
* 1. CMOS output and N-ch open drain output switchable output buffer.
2. Instruction execution
SIO0
*1
Shift Register (8)
8
8
Q
SO Output
Latch
Serial Clock
Counter (3)
Clear
Fig 5-7 Serial Interface Block Diagram
R
S
SIO7
SIO
Overflow
Internal Bus
SIOM7SIOM6SIOM5SIOM4SIOM3SIOM2SIOM1SIOM0
MPX
Serial Start
8
SET1 *2
f
f
xx
xx
/2
/2
4
10
SIOM
IRQSIO
Clear Signal
INTSIO
IRQSIO
Set Signal