CMOSTEK CMT2380F17, Manual

Page: 17 / 347

CMT2380F17
Rev0.1 | 17/347
www.cmostek.com
1.8 Requirement on Crystals for RF Section
Parameter Symbol Condition Min. Typ. Max. Unit
Crystal frequency
[1]
F
XTAL
26 MHz
Crystal frequency
tolerance
[2]
ppm 20 ppm
Load capacitance C
LOAD
15 pF
ESR Rm 60
Ω
Crystal startup time
[3]
t
XTAL
400 us
Notes:
[1]. An external reference clock can be used to drive the
XI pin directly through a coupling capacitor if such a clock is available. The peak-to-peak level of the external reference
clock is required between 0.3 and 0.7 V.
[2]. It involves:(1) initial tolerance, (2) crystal loading, (3)
aging, and (4) temperature changing. The acceptable crystal frequency tolerance is subject to the bandwidth of the
receiver and the RF tolerance between the receiver and its paired transmitter.
[3]. This parameter is to a large degree crystal dependent.
1.9 Controller DC Specification
Parameter Symbol Condition Min. Typ. Max. Unit
Input high level (all IO ports)
V
IH1
Except P6.0 and P6.1. 0.6 V
DD
Input high level (RST, P6.0, P6.1)
V
IH2
0.75 V
DD
Input low level (all IO ports)
V
IL1
Except P6.0 and P6.1. 0.15 V
DD
Input low level (RST, P6.0, P6.1)
V
IL2
0.2 V
DD
Input high leakage current (all IO
ports)
I
IH
V
PIN
= V
DD
0
±
1 uA
Logic 0 input current (P3 is in
quasi-bidirectional port mode or
input port with on-chip pull-up
resistor)
I
IL1
V
PIN
= 0.4V -20 -30 uA
Logic 0 input current (all
input-only or open-drain output
ports)
I
IL2
V
PIN
= 0.4V 0 -1 uA
Logic 1 to 0 input conversion
current
(P3 is in
quasi-bidirectional port mode)
I
H2L
V
PIN
= 1.8V -320 -450 uA
Output high current (P3 is in
quasi-bidirectional port mode)
I
OH1
V
PIN
=2.4V, V
DD
=3.3V -50 -80 uA
Output high current (all push-pull
output ports)
I
OH2
V
PIN
=2.4V, V
DD
=3.3V -8 -11 mA
Output low current (all I/O ports)
I
OL1
V
PIN
=0.4V, V
DD
=3.3V 14 17 mA
Output high current (low drive
capability of all push-pull output
ports, except RST pin)
I
OL2
V
PIN
=0.4V, V
DD
=3.3V 1.2 2.2 mA
Output low current (low drive
capability of all I/O ports)
I
OL2
V
PIN
=0.4V
，
except P6.0
，
P6.1
，
P4.7 2 mA
Internal reset pull-down
resistance
R
RST
V
DD
=3.3V 207 K
Ω