ST72T774J9B1 STMicroelectronics, ST72T774J9B1 Datasheet - Page 119

• 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

PWM/BRM GENERATOR (Cont’d)
Figure 73. Simplified Filtered Voltage Output Schematic with BRM added
Figure 74. Graphical Representation of 4-Bit BRM Added Pulse Positions
BRM VALUE
0001 bit0=1
0100 bit2=1
0100 bit2=1
0001 bit0=1
Examples
PWMOUT
VOLTAGE
OUTPUT
0110
1111
VDD
VDD
0V
0V
0
1
2
3
EXTENDED PULSE
4
BRM
5
PWM Pulse Number (0-15)
=
T
CPU
6
7
8
9
=
10
ST72774/ST727754/ST72734
11
12
13
BRM = 0
BRM = 1
14
15
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