參數(shù)資料
型號: 73M2921-IG
廠商: Electronic Theatre Controls, Inc.
英文描述: Advanced Single Chip Modem
中文描述: 先進的單芯片調(diào)制解調(diào)器
文件頁數(shù): 3/41頁
文件大?。?/td> 222K
代理商: 73M2921-IG
73M2921
Advanced Single
Chip Modem
February 99 Rev M
TDK Semiconductor
Page 3 of 41
PIN DESCRIPTION
POWER
NAME
VPD
PIN
3, 23,
51, 82
4, 20,
52, 74
29, 36
27, 37
32
TYPE
I
DESCRIPTION
DIGITAL POWER: Positive Digital Power.
VND
I
DIGITAL POWER: Negative Digital Power.
VPA
VNA
VREF
I
I
ANALOG POWER: Positive Analog Power.
ANALOG POWER: Negative Analog Power.
VREF: Analog voltage reference for biasing of off chip analog function.
Maximum output current is +/- 20
μ
A.
BANDGAP VOLTAGE: Bandgap voltage pin used as a connection point
for an external capacitor for noise reduction only.
O
VBG
33
O
CLOCKS AND RESETS
NAME
XTALI
PIN
22
TYPE
I
DESCRIPTION
CRYSTAL INPUT: Onboard crystal oscillator input, or the master clock
input to the 73M2921 if the crystal oscillator is not used.
CRYSTAL OUTPUT: Onboard crystal oscillator output should be left
unconnected if the crystal oscillator on the 73M2921 is not used. Along
with XTALI and proper loading capacitors, these pins include an inverter
for use with parallel resonant mode crystals.
MICROCONTROLLER CLOCK: Programmable clock output for use
when the system oscillator is on the 73M2921. May be used to drive the
system controller. The output frequency is controlled by CR0 bits D11-
D9 (MCLK [2:0]).
MASTER CHIP RESET: Active High Input with hysteresis. Resets the
73M2921 and the control registers. If not used as a reset source, this
pin must be tied low.
XTALO
21
I
MICCLK
19
O
RESET
40
I
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