U3600BM Datasheet, PDF (16/43 Pages) ATMEL Corporation – SINGLE CHIP CORDLESS TELEPHONE IC

Electrical Characteristics (Continued)
T_amb = +25°C, VRF = VAF = RFOVB = 3.6 V, all bits set to “0”, unless otherwise specified. Test circuit, see Figure 7.
Parameters
Test Conditions
Symbol Min.
Typ.
Max.
Unit
Remark:
The tx conversion gain of the RF transmitter is somehow dependent on temperature. This is determined by the fundamental principle
of this circuitry. Means have been taken inside the limiter amplifier, being in the signal path before MODIN, which are able to
completely compensate this temperature behavior.
Logical Part
Inputs: C, D
Low voltage input
High voltage input
Vil
Vih
0.8 ´ V_DD
0.2 ´ V_DD
Input leakage current
(0 < VI < VDD)
Input leakage current
Pin XCK (0 < VI < VDD)
Serial bus (Figure 8)
Data set-up time
Data hold time
Clock low time
Clock high time
Hold time before transfer
condition
Data low pulse on transfer
condition
Data high pulse on transfer
condition
Ii
–1
–5
tsud
0.1
thd
0
tcl
2
tch
2
teon
0.1
teh
0.2
teoff
0.2
+5
µA
+5
µA
µs
µs
µs
µs
µs
µs
µs
.
Fine Adjustment of the Oscillator Frequency
To set the frequency of the oscillator exact to 11.15 MHz, the frequency is adjustable in 8 steps, by adding 3 different
internal capacities the frequency could be reduced.
Parameters
Test Conditions / Pins
Min.
Typ.
Max.
Unit
Oscillator frequency without
reduction
FAOS (0:2) = 0
11.15
+D
MHz
Changing of oscillator frequency
with FOSC reduction
FAOS2 FAOS1 FAOS0
00
1
01
0
10
0
10
1
140
280
Hz
560
700
16 U3600BM
4516C–CT0–08/02