UPD78F0890GK(A)-GAJ-AX NEC, UPD78F0890GK(A)-GAJ-AX Datasheet - Page 357

• Manufacturer Part Number: UPD78F0890GK(A)-GAJ-AX
• Description: 8BIT MCU, 128K FLASH, 7K RAM, LQFP
• Manufacturer: NEC

Specifications of UPD78F0890GK(A)-GAJ-AX

• Controller Family/series: UPD78F
• No. Of I/o's: 55
• Ram Memory Size: 7KB
• Cpu Speed: 20MHz
• No. Of Timers: 10
• No. Of Pwm: RoHS Compliant
• Core Size: 8bit
• Program Memory Size: 128KB
• Oscillator Type: External, Internal

15.1 Functions of Serial Interfaces CSI10 and CSI11
(1) Operation stop mode
(2) 3-wire serial I/O mode (MSB/LSB-first selectable)
The 78K0/FE2 incorporate serial interfaces CSI10 and CSI11.
Serial interfaces CSI10 and CSI11 have the following two modes.
• Operation stop mode
• 3-wire serial I/O mode
This mode is used when serial communication is not performed and can enable a reduction in the power
consumption.
For details, see 15.4.1 Operation stop mode.
This mode is used to communicate 8-bit data using three lines: a serial clock line (SCK1n) and two serial data
lines (SI1n and SO1n).
The processing time of data communication can be shortened in the 3-wire serial I/O mode because transmission
and reception can be simultaneously executed.
In addition, whether 8-bit data is communicated with the MSB or LSB first can be specified, so this interface can
be connected to any device.
The 3-wire serial I/O mode is used for connecting peripheral ICs and display controllers with a clocked serial
interface.
For details, see 15.4.2 3-wire serial I/O mode.
Remark
n = 0, 1
CHAPTER 15 SERIAL INTERFACES CSI10 AND CSI11
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