參數(shù)資料
型號(hào)： Z02922
廠商： ZiLOG, Inc.
英文描述： Synchronous Single-chip Modem(同步單片調(diào)制解調(diào)器)
中文描述： 同步單芯片調(diào)制解調(diào)器（同步單片調(diào)制解調(diào)器）
文件頁數(shù)： 3/7頁
文件大?。?/td> 103K
代理商： Z02922
=L/2*
Z02922 Product Update
OT002200-MOD0599
3
/*
* Tone dial a digit. Addendum 24-Jun-98: Assumes that Config.MODE = 3
* (dial mode) and the timing parameters are also set.
*/
void tone_dial(digit)
char digit;
{
ltemp = read_DSP_RAM(DTMFREG); /* set the digit */
ltemp &= 0xfff0;
ltemp |= digit | TONEDIAL; /* set tone mode (b7=1) */
write_DSP_RAM(DTMFREG, ltemp);
RTS_on(); /* transmit the tone (set RTSP = 1)*/
/*
* set b3 of 0x1f7 -- bug workaround for Ver. 3A (R3796) of DSP code
* -- this action sets DPBUSY = 1
*/
write_DSP_RAM(0x1f7, read_DSP_RAM(0x1f7) | 0x8);
while (!(inp(MDMST) & DPBUSY)); /* wait for start */
while (inp(MDMST) & DPBUSY); /* wait for completion */
RTS_off(); /* turn off tone */
}
Figure 1. Problem #6–Dialing a DTMF Digit
Problem #7: Carrier Detection in V.22bis, V.22,
and Bell 212A at -42 dBm Receive Level and Low-
er
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Version:
Z02922 Ver. 0X3A (R3796)
Updated:
23-Dec-98
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參數(shù)描述
Z0292212VSCR3796 功能描述:電信線路管理 IC V.29 QC TRANSPRO RoHS:否 制造商:STMicroelectronics 產(chǎn)品:PHY 接口類型:UART 電源電壓-最大:18 V 電源電壓-最小:8 V 電源電流:30 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VFQFPN-48 封裝:Tray
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