MC33690DWE Freescale Semiconductor, MC33690DWE Datasheet - Page 11

• Manufacturer Part Number: MC33690DWE
• Description: IC STAND ALONE TAG READER 20SOIC
• Manufacturer: Freescale Semiconductor

Specifications of MC33690DWE

• Rf Type: Read / Write
• Frequency: 125kHz
• Features: Wide Supply Voltage Range
• Package / Case: 20-SOIC (0.300", 7.50mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

7.1
The timing definitions for a 8 MHz crystal are:
T
may toggle from read to write (or from write to read) between T
T
standby between T
Freescale Semiconductor
0
1
is the minimum time required to guarantee the device toggles from read to write (or from write to read). However, the STARC
is the minimum time required to guarantee the device toggles from write to standby. However, the STARC may toggle in
•
•
•
•
•
•
T
T
T
T
T
T
Read to write mode:
K line
Write to standby mode:
Write to read mode:
K line
K line
K line
Standby mode to read mode:
ref
0
0
1
1
2
=8064.T
’=7932.T
=16256.T
’=16128.T
=4096.T
Timing Definitions for a 8 MHz Crystal
is crystal oscillator period (125 ns typ.)
standby mode
read mode
write mode
write mode
1
ref
ref
and T
ref
Reset
ref
ref
, = 512µs typ.
= 1.008ms typ.
Figure 6. Mode Access Description in One-Wire Bus Configuration
= 0.992ms typ.
= 2.032ms typ.
= 2.016ms typ.
1
’.
MC33690 Standalone Tag Reader Circuit, Rev. 5
Read
T
Figure 7. Configuration A State Diagram
0
£ t < T
t ŠT
t Š T
Wake-up
0
1
T
T
0
0
0
’+T
£ K line high
£ K line low
1
’
wake-up sequence
T
K
1
0
£ K line low
and T
TD1/2 off
Write
1
0
’.
T
K line low
2
Standby
acknowledge
Standalone Configuration with One-Wire Bus
1
T
K line high < T
2
1
switching
TD1/2
write
0
0
’
standby mode
read mode
write mode
read mode
0
0
11