Rainbow Electronics AT42QT1110-AZ - Manual (Page 40)

40
9570H–AT42–02/10
AT42QT1110-MZ/AT42QT1110-AZ
Figure 8-1. Signals on SPI Pins During the Exchange of a Data Byte
8.6 External Reset
8.7 Internal Resonator
SAMPLE
MOSI/MISO
CHANGE
MOSI PIN
CHANGE
MISO PIN
SCK
SS
MSB Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 LSB
Parameter Description Operation
V
RST
Threshold voltage low (Activate)
Threshold voltage high (Release) 0.2Vdd
0.9Vdd
Reset Minimum length of Reset low
600 ns at 5V
1100 ns at 3V
Parameter Operation
Internal RC oscillator 8 MHz with spread-spectrum modifier during measurement bursts