ST7265XEVALMS STMicroelectronics, ST7265XEVALMS Datasheet - Page 90

• Manufacturer Part Number: ST7265XEVALMS
• Manufacturer: STMicroelectronics

Specifications of ST7265XEVALMS

• Lead Free Status / Rohs Status: Supplier Unconfirmed

ST7265x
PWM/BRM GENERATOR (Cont’d)
PWM/BRM Outputs
The PWM/BRM outputs are assigned to dedicated
pins.
The PWM/BRM outputs can be connected to an
RC filter (see
The RC filter time must be higher than T
Figure 49. Typical PWM Output Filter
Figure 50. PWM Simplified Voltage Output After Filtering
90/163
OUTPUT
STAGE
VOLTAGE
VOLTAGE
PWMOUT
PWMOUT
OUTPUT
OUTPUT
V
V
V
V
0V
0V
0V
0V
DD
DD
DD
DD
"CHARGE"
Figure 49
"CHARGE"
for an example).
"DISCHARGE"
R
ext
"DISCHARGE"
CPU
OUTPUT
VOLTAGE
C
ext
x64.
"CHARGE"
Table 29. 6-Bit PWM Ripple After Filtering
With RC filter (R=1KΩ),
f
V
PWM Duty Cycle 50%
R=R
Note: after a reset these pins are tied low by de-
fault and are not in a high impedance state.
CPU
DD
"CHARGE"
= 5V
Cext (µF)
= 8 MHz
ext
0.128
1.28
12.8
"DISCHARGE"
"DISCHARGE"
V RIPPLE (mV)
V
ripple
0.78
7.8
V ripple (mV)
78
(mV)
V
V
OUTAVG
OUTAVG