參數(shù)資料
型號(hào): 73M2921
廠商: Electronic Theatre Controls, Inc.
英文描述: Advanced Single Chip Modem
中文描述: 先進(jìn)的單芯片調(diào)制解調(diào)器
文件頁數(shù): 14/41頁
文件大?。?/td> 222K
代理商: 73M2921
73M2921
Advanced Single
Chip Modem
Page 14 of 41
TDK Semiconductor
February 99 Rev M
REGISTER NAME:
CR2 controls analog port enable, analog loopback, ADC receive gain, VREF voltage, charge pump, and wide
transmit bandwidth. It also has bits that are reserved for test modes.
CR2 Configuration Register 2
ADDRESS: 06H (110b)
D15
D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
WIDE
TX BW
N/A
VREF
N/A
TDK
EN
ANALOG
TEST
5
TEST
4
0
0
0
0
0
0
0
0
BIT NO.
D0 – D7
D8
D9
D10
NAME
N/A
Test 4
Test 5
Enable
Analog
CONDITION
0
0
0
1
DESCRIPTION
Not Used.
Must be zero.
Must be zero.
Analog port turned on. The timer must also be enabled (CR1:D15).
NOTE: When the analog port is enabled and the timer is disabled, the
ADC output is looped to the DAC input.
0
Analog port turned off. All analog currents are off, including the
bandgap generator. The setting of the ENOSC register bit to the
disabled state also forces all analog power to be turned off.
TDK proprietary.
Not used.
Selects the voltage reference voltage
D11
D12
D13
TDK
N/A
VREF
0
Set to 0
1
1
0
1.25V DSP detectors require this setting on this version.
Not used.
Sets the transmit filter to pass 10KHz
Sets the transmit filter to pass 3KHz (default)
D14
D15
N/A
Wide Transmit
Bandwidth
(3) GENERAL REGISTER ACCESS (GRA)
For General Register Access (GRA), the mailbox the Control byte from the host controller is broken down into
bit segments as follows:
General Register Access Control Byte: Microcontroller to 73M2921
BIT 7
Res
0
BIT 6
WT/
%7
0
BIT 5
R/
:
1/0
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
---------- Register Address Bits --------------
Res = Reserved
WT/
%7
= Word Transfer/Byte Transfer. Should be 0 (byte transfer) for GRA.
R/
:
= Read / Write. 1 = Read, 0 = Write
Register Address Bits = 5 bit address for the register being accessed. See General Register descriptions in the
following section.
(Register address 00000b is reserved CR0 location)
Reading and writing to the General Registers via the Mailbox is a four step process for the
μ
C.
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