- 您现在的位置：买卖IC网 > PDF目录383307 > MA28151 (Dynex Semiconductor Ltd.) Radiation hard Programmable Communication Interface PDF资料下载
参数资料
| 型号： | MA28151 |
| 厂商： | Dynex Semiconductor Ltd. |
| 英文描述： | Radiation hard Programmable Communication Interface |
| 中文描述： | 辐射硬可编程通信接口 |
| 文件页数： | 7/22页 |
| 文件大小： | 186K |
| 代理商： | MA28151 |
MA28151
7/22
Figure 6: Transmission Format
Figure 7: Receive Format
3.6 SYNCHRONOUS MODE (TRANSMISSION)
The TxD output is continuously high until the CPU sends its
first character to the MA28151 which usually is a SYNC
character. When the
CTS
line goes low, the first character is
serially transmitted out. All characters are shifted out on the
falling edge of
TxC
. Data is shifted out at the same rate as the
TxC
.
Once transmission has started, the data stream at the TxD
output must continue at the
TxC
rate. If the CPU does not
provide the MA28151 with a data character before the
MA28151 Transmitter Buffers become empty, the SYNC
characters (or character if in single SYNC character mode) will
be automatically inserted in the TxD data stream. In this case,
the TxEMPTY does not go low when the SYNC is being shifted
out (see figure 8). The TxEMPTY pin is internally reset by a
data character being written into the MA28151.
3.7 SYNCHRONOUS MODE (RECEIVER)
In this mode character synchronisation can be internally or
externally achieved. If the SYNC mode has been
programmed, ENTER-HUNT command should be included in
the first command instruction word written. Data on the RxD
pin is then sampled on the rising edge of
RxC
. The content of
the Rx buffer is compared to every bit boundary with the first
SYNC character until a match occurs.
If the MA28151 has been programmed for two SYNC
characters, the subsequent received character is also
compared; when both SYNC characters have been detected,
the USART ends the HUNT mode and is in character
synchronization. The SYNDET pin is then set high, and is reset
automatically by a STATUS READ. If parity is programmed,
SYNDET will not be set until the middle of the parity bit, instead
of the middle of the last data bit.
In the external SYNC mode, synchronization is achieved
by applying a high level on the SYNDET pin, thus forcing the
MA28151 out of the HUNT mode. The high level can be
removed after one
RxC
cycle. An ENTER HUNT command
has no effect in the asynchronous mode of operation.
Figure 8: Sync Character Insertion
PARITY BIT
DATA CHARACTER
STOP BITS
START BIT
DATA CHARACTER
ASSEMBLED SERIAL DATA OUTPUT (TxD)
CPU BYTE (5-8 BITS/CHARACTER)
PARITY BIT
DATA CHARACTER
STOP BITS
START BIT
DATA CHARACTER
SERIAL DATA INPUT (RxD)
CPU BYTE (5-8 BITS/CHARACTER) (See Note Below)
NOTE: If character length is defined as 5, 6 or 7 bits the unused bits are set to zero.
相关PDF资料 |
PDF描述 |
|---|---|
| MA28155 | Radiation Hard Programmable Peripheral Interface |
| MA31750 | High Performance MIL-STD-1750 Microprocessor |
| MA31751 | Memory Management & Block Protection Unit |
| MA31753 | DMA Controller (DMAC) For An MA31750 System |
| MA31755 | 16-Bit Feedthrough Error Detection & Correction Unit EDAC |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MA28151GBB | 功能描述:专用陶瓷电容器 HF CHIP RoHS:否 制造商:Panasonic Electronic Components 电容:470 pF 容差:10 % 电压额定值:250 VAC 工作温度范围:- 25 C to + 125 C 端接类型:SMD/SMT 外壳代码 - in: 外壳代码 - mm: |
| MA28151GBN | 功能描述:专用陶瓷电容器 HF CHIP RoHS:否 制造商:Panasonic Electronic Components 电容:470 pF 容差:10 % 电压额定值:250 VAC 工作温度范围:- 25 C to + 125 C 端接类型:SMD/SMT 外壳代码 - in: 外壳代码 - mm: |
| MA28151JBB | 功能描述:专用陶瓷电容器 HF CHIP RoHS:否 制造商:Panasonic Electronic Components 电容:470 pF 容差:10 % 电压额定值:250 VAC 工作温度范围:- 25 C to + 125 C 端接类型:SMD/SMT 外壳代码 - in: 外壳代码 - mm: |
| MA28151JBN | 功能描述:专用陶瓷电容器 HF CHIP RoHS:否 制造商:Panasonic Electronic Components 电容:470 pF 容差:10 % 电压额定值:250 VAC 工作温度范围:- 25 C to + 125 C 端接类型:SMD/SMT 外壳代码 - in: 外壳代码 - mm: |
| MA28151KBB | 功能描述:专用陶瓷电容器 HF CHIP RoHS:否 制造商:Panasonic Electronic Components 电容:470 pF 容差:10 % 电压额定值:250 VAC 工作温度范围:- 25 C to + 125 C 端接类型:SMD/SMT 外壳代码 - in: 外壳代码 - mm: |
发布紧急采购，3分钟左右您将得到回复。