ST72C254G2M6 STMicroelectronics, ST72C254G2M6 Datasheet - Page 84

• Manufacturer Part Number: ST72C254G2M6
• Description: IC MCU 8BIT 8K FLASH SOIC-28
• Manufacturer: STMicroelectronics
• Series: ST7r

Specifications of ST72C254G2M6

• Core Processor: ST7
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: I²C, SPI
• Peripherals: LVD, POR, PWM, WDT
• Number Of I /o: 22
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 3.2 V ~ 5.5 V
• Data Converters: A/D 6x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 28-SOIC (7.5mm Width)
• Controller Family/series: ST7
• No. Of I/o's: 22
• Ram Memory Size: 256Byte
• Cpu Speed: 8MHz
• No. Of Timers: 2
• Rohs Compliant: Yes
• Processor Series: ST72C2x
• Core: ST7
• Data Bus Width: 8 bit
• Data Ram Size: 256 B
• Interface Type: I2C, SPI
• Maximum Clock Frequency: 16 MHz
• Number Of Programmable I/os: 22
• Number Of Timers: 3 bit
• Operating Supply Voltage: 3.2 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Development Tools By Supplier: ST7MDT1-DVP2/US
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 8 bit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: In Transition

ST72104Gx, ST72215Gx, ST72216Gx, ST72254Gx
I
I
Read / Write
Reset Value: 0000 0000 (00h)
7-bit Addressing Mode
Bit 7:1 = ADD[7:1] Interface address.
These bits define the I
face. They are not cleared when the interface is
disabled (PE=0).
Bit 0 = ADD0 Address direction bit.
This bit is don’t care, the interface acknowledges
either 0 or 1. It is not cleared when the interface is
disabled (PE=0).
Note: Address 01h is always ignored.
10-bit Addressing Mode
Bit 7:0 = ADD[7:0] Interface address.
These are the least significant bits of the I
address of the interface. They are not cleared
when the interface is disabled (PE=0).
84/141
2
2
ADD7 ADD6 ADD5 ADD4 ADD3 ADD2 ADD1 ADD0
C BUS INTERFACE (Cont’d)
C OWN ADDRESS REGISTER (OAR1)
7
2
C bus address of the inter-
2
C bus
0
I
Read / Write
Reset Value: 0100 0000 (40h)
Bit 7:6 = FR[1:0] Frequency bits.
These bits are set by software only when the inter-
face is disabled (PE=0). To configure the interface
to I
sponding to the microcontroller frequency F
Bit 5:3 = Reserved
Bit 2:1 = ADD[9:8] Interface address.
These are the most significant bits of the I
address of the interface (10-bit mode only). They
are not cleared when the interface is disabled
(PE=0).
Bit 0 = Reserved.
2
C OWN ADDRESS REGISTER (OAR2)
FR1
7
2
C specified delays select the value corre-
FR0
6 to 8 MHz
< 6 MHz
f
CPU
0
0
0
FR1
0
0
ADD9 ADD8
FR0
2
CPU
0
1
C bus
0
0
.