ST72T774J9B1 STMicroelectronics, ST72T774J9B1 Datasheet - Page 120

• 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
PWM/BRM GENERATOR (Cont’d)
4.9.3.2 PWM/BRM OUTPUTS
The PWM/BRM outputs are assigned to dedicated
pins.
If necessary, these pins can be used in push-pull
or open-drain modes under software control.
In these pins, the PWM/BRM outputs are
connected to a serial resistor which must be taken
into account to calculate the RC filter.
Figure 75. Precision for PWM/BRM Tuning for VOUTEFF (After filtering)
120/144
4 - Bit
BRM
6 - Bit
PWM
6 - Bit
BRM
or
0
1
1
1
2
10
3
20
5
4
10
40
50
60
61
15
63
16
64
62
sub steps of V
sub steps of
63
V
DD
64
0F
V
1024
4096
DD
DD
STEPS
each
each
V
DD
64
each