ZTE Corporation ZTEMC2261 Manuale Utente
All Rights reserved, No Spreading abroad without
Permission
16
MC2261
Hardware Development Guide of Module Product
Ready
Connect to DCD,
2.85V Level
60
DSR
I
Data Set Ready
2.85V
UART Port,
Connect to DTR, 2.85V
Level
61
NA
Reserved
62
GND
Ground
63
USE_LED
O
In-use LED
LED ON as the level is
high. 2.85V Level
64
NA
Reserved
65
NA
Reserved
66
GPIO42
Digital
I/O
GPIO
1.8V
0
（Iutput PD）
1.8V Level
67
GPIO43
Digital
I/O
GPIO
1.8V
0
（Iutput PD）
1.8V Level
68
GND
Ground
NOTE:
1 All the pin can be left open ,when they are not used.
2 I/O stands for Inupt/Output, P stands for Power, B stands for Bi-Directional.
3 PU/PD stands for Pull-up/Pull-down.
4 The unit of Min, Typ, Max is V.
2.2. D
IGITAL LOGIC CHARACTERISTICS
Specifications for the digital I/Os of the baseband functions depend upon the pad voltage being used. The MC2261 I/O uses
two pad voltages: 1.8 and 2.85 V. Digital I/O specifications under both pad voltage conditions are presented in Table 2-2 and Table
2-3
Table 2–2 Baseband digital I/O characteristics for VDD_PX = 1.8 V nominal
Parameter
Min
Typ
Max
Unit
VIH
High-level input voltage
0.65·VDD_PX
-
VDD_PX+0.3
V
VIL
Low-level input voltage
-0.3
-
0.35·VDD_PX
V
VOH
High-level output voltage4
VDD_PX-0.45
-
VDD_PX
V
VOL
Low-level output voltage 4
0
-
0.45
V
Table 2–3 Baseband digital I/O characteristics for VDD_PX = 2.85 V nominal
Parameter
Min
Typ
Max
Unit
VIH
High-level input voltage
0.65·VDD_PX
-
VDD_PX+0.3
V
VIL
Low-level input voltage
-0.3
-
0.35·VDD_PX
V
VOH
High-level output voltage4
VDD_PX-0.45
-
VDD_PX
V
VOL
Low-level output voltage 4
0
-
0.45
V