STMPE821QTR STMicroelectronics, STMPE821QTR Datasheet - Page 45

• Manufacturer Part Number: STMPE821QTR
• Description: IC CTLR TOUCH KEY 8CH CAP 16-QFN
• Manufacturer: STMicroelectronics
• Type: Capacitiver

Specifications of STMPE821QTR

• Number Of Inputs/keys: 8 Key
• Data Interface: I²C
• Voltage - Supply: 1.65 V ~ 1.95 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 16-QFN
• Voltage Supply Source: Single Supply
• Resolution: 7 bit to 10 bit
• Interface Type: I2C
• Supply Voltage (max): 3.6 V
• Supply Voltage (min): 2.7 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Number Of Channels: 8
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Sampling Rate (per Second): -
• Resolution (bits): -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 497-8826-2

STMPE821
PWM_CTRL_n
Address:
Type:
Reset:
Description:
7
PERIOD_0
[7:6] PERIOD_0:
[5:4] PERIOD_1:
[3:1] REPETITION:
[0] FRAME_ORDER:
6
0xB1, 0xB5, 0xB9, 0xBD
R/W
0x00
This register controls the sequence and repetition of blinking.
This defines the ON period time which is when the PWM channel output is toggling. The time
unit is as defined in the TIMING bits of the respective TIMING_SETUP registers:
00: 1 time unit
01: 2 time unit
10: 3 time unit
11: 4 time unit
This defines the OFF period time which is when the PWM channel output is low, that is, not
toggling. The time unit is as defined in the TIMING bits of the respective TIMING_SETUP
registers:
00: 0 time unit. This means that there is no OFF period but only ON period, that is, the PWM
channel output will always be toggling.
01: 1 time unit
10: 2 time unit
11: 3 time unit
This defines the number of repetition of pairs of PERIOD_0 and PERIOD_1.
000: infinite repetition.
001: execute only one pair.
010: execute 2 pairs
011: execute 3 pairs
100: execute 4 pairs
101: execute 5 pairs
110: execute 6 pairs
111: execute 7 pairs
For PWM mode, this defines which frame, PERIOD_0 or PERIOD_1 comes first.
0: PERIOD_0 is outputted first then PERIOD_1.
1: PERIOD_1 is outputted first then PERIOD_0.
5
PERIOD_1
PWM control register n=0-3
4
3
REPETITION
2
Basic PWM controller
1
FRAME_ORDER
0
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