ST72T774J9B1 STMicroelectronics, ST72T774J9B1 Datasheet - Page 38

• Manufacturer Part Number: ST72T774J9B1
• Manufacturer: STMicroelectronics

Specifications of ST72T774J9B1

• Cpu Family: ST7
• Device Core Size: 8b
• Frequency (max): 24MHz
• Interface Type: I2C/USB
• Program Memory Type: EPROM
• Program Memory Size: 60KB
• Total Internal Ram Size: 1KB
• # I/os (max): 31
• Number Of Timers - General Purpose: 1
• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (max): 5.5V
• Operating Supply Voltage (min): 4V
• On-chip Adc: 1-chx8-bit
• On-chip Dac: 1-chx8-bit
• Instruction Set Architecture: CISC
• Operating Temp Range: 0C to 70C
• Operating Temperature Classification: Commercial
• Mounting: Through Hole
• Pin Count: 42
• Package Type: SPDIP
• Lead Free Status / Rohs Status: Specific Sites Compliant

ST72774/ST727754/ST72734
I/O PORTS (Cont’d)
4.1.7 Register Description
Data Registers (PxDR)
Read /Write
Reset Value: 0000 0000 (00h)
Table 12. I/O Ports Register Map
38/144
Address
MSB
(Hex.)
7
00
01
02
03
04
05
06
07
Register
PADDR
PBDDR
PCDDR
PDDDR
Name
PADR
PBDR
PCDR
PDDR
MSB
MSB
MSB
MSB
MSB
MSB
MSB
MSB
7
6
LSB
0
5
Data Direction Registers (PxDDR)
Read/Write
Reset Value: 0000 0000 (00h) (as inputs)
MSB
7
4
3
2
1
LSB
LSB
LSB
LSB
LSB
LSB
LSB
LSB
0
LSB
0