UPD78F1154GK-GAK-AX NEC, UPD78F1154GK-GAK-AX Datasheet - Page 54

• Manufacturer Part Number: UPD78F1154GK-GAK-AX
• Description: 16BIT MCU, 128K FLASH, 8K RAM, SMD
• Manufacturer: NEC

Specifications of UPD78F1154GK-GAK-AX

• Controller Family/series: UPD78F
• No. Of I/o's: 70
• Ram Memory Size: 8192Byte
• Cpu Speed: 20MHz
• No. Of Timers: 9
• No. Of: RoHS Compliant
• Core Size: 16bit
• Program Memory Size: 128KB
• Oscillator Type: External, Internal

54
7.10 Serial Interface IIC0
SCL0/
SDA0/
P60
P61
Serial interface IIC0 has the following two modes.
(1) Operation stop mode
(2) I
drain output
drain output
N-ch open-
N-ch open-
This mode is used when serial transfers are not performed. It can therefore be used to reduce power
consumption.
This mode is used for 8-bit data transfers with several devices via two lines: a serial clock (SCL0) line and a
serial data bus (SDA0) line.
2
C bus mode (multimaster supported)
PM60
PM61
Output
Output
DFC0
eliminator
(P61)
(P60)
latch
latch
Noise
eliminator
Noise
DFC0
Figure 7-10. Block Diagram of Serial Interface IIC0
IIC shift register 0
Serial clock controller
Acknowledge detector
controller
Serial clock counter
Output
TRC0
Stop condition
Start condition
(IIC0)
register 0 (SVA0)
Slave address
detector
detector
f
CLK
Preliminary Product Information U17892EJ2V0PM
Match signal
CLD0 DAD0 SMC0 DFC0 CL01 CL00
IICE0
D Q
IIC control register 0
correction
Data hold
Clear
Set
circuit
LREL0 WREL0 SPIE0 WTIM0 ACKE0 STT0 SPT0
time
SO latch
Prescaler
CL01,
(IICC0)
CL00
Internal bus
IIC clock select
register 0 (IICCL0)
wait controller
Serial clock
IICS0.MSTS0, EXC0, COI0
Internal bus
Acknowledge
IICC0.STT0, SPT0
generator
CLX0
IIC status register 0 (IICS0)
Interrupt request
IIC function expansion
register 0 (IICX0)
signal generator
MSTS0 ALD0 EXC0 COI0 TRC0 ACKD0 STD0 SPD0
IIC shift register 0
(IIC0)
condition
generator
generator
condition
Start
IICS0.MSTS0,
EXC0, COI0
Stop
Wake-up
controller
STCF IICBSY STCEN IICRSV
INTIIC0
IIC flag register 0
(IICF0)
78K0R/KF3
Bus status
detector