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参数资料
| 型号： | TAS3218IPZPR |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 消费家电 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP100 |
| 封装： | GREEN, PLASTIC, TQFP-100 |
| 文件页数： | 21/79页 |
| 文件大小： | 1263K |
| 代理商： | TAS3218IPZPR |
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I C Sub Address x 0C
2
S Slave Addr
Sub Addr
Ack
Ack WDE
See Note A
Res
Reset
“0” (default state) enables
watchdog timer
GPIO IN/OUT GPIO DIR
31
30
27
1
0
25
Ack
GPIOMICROCOUNT
MS BYTE
GPIOMICROCOUNT
LS BYTE
Ack
GPIO_samp_int
0
24
23
15
7
0
Watchdog Timer
MICRO_CLK
Data_IN_OUT
Data Path
Switch
Sampling
Logic
Decode 2^16
8051 uC Firmware
8051 uControl
Down Counter
LD
Q
D
GPIO1
ENB
Q
D
GPIO1
ENB
SLES235 – JULY 2008 ....................................................................................................................................................................................................... www.ti.com
Watchdog Timer
There is a hardware watchdog timer in the TAS3218 that can be programmed in the customer application code
to monitor the microprocessor activity. If the watchdog timer expires it will generate a reset to the 8051
microprocessor. GPIOMICROCOUNT, in subaddress 0x0C, is used in order to trigger GPIO input/output and the
monitoring to the DSP diagnostic count. Because of this, the value selected for GPIOMICROCOUNT must be
chosen to provide a good tradeoff of between micro overheard and adequate execution frequency of these
processes. The default value for this counter is 0x5820 which corresponds to a period of 1.25 ms.
Figure 18 shows the GPIO register, the GPOI interface, and a typical user application code implementation of the
watchdog timer reset.
A.
Determines how many consecutive Logic 0 samples (where each sample is spaced by GPIOMICROCOUNT
Micro_clks) are required to read a Logic 0 on a GPIO input port
Figure 18. GPIO Ports
28
Copyright 2008, Texas Instruments Incorporated
Product Folder Link(s): TAS3218
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| TAS3218PZP | 功能描述:音频 DSP Dig Audio SoC for multi-channel app RoHS:否 制造商:Texas Instruments 工作电源电压: 电源电流: 工作温度范围: 安装风格: 封装 / 箱体: 封装:Tube |
| TAS3218PZPR | 功能描述:音频 DSP Dig Audio SoC for multi-channel app RoHS:否 制造商:Texas Instruments 工作电源电压: 电源电流: 工作温度范围: 安装风格: 封装 / 箱体: 封装:Tube |
| TAS-3225A | 制造商:TEW 功能描述: |
| TAS-3225A 44.000KHZ | 制造商:TEW 功能描述: |
| TAS-3225J 13.56MHz }20ppm/22pF | 制造商:Tokyo Denpa 功能描述:13.560000MHz }20ppm }15ppm 22pF 3.2~2.5~0.55mm +85 -30 3.2mm 2.5mm 0.55mm Cut Tape |
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