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| 型號(hào)： | AT85C51SND3B1-RTTUL |
| 廠商： | Atmel |
| 文件頁(yè)數(shù)： | 88/119頁(yè) |
| 文件大?。?/td> | 0K |
| 描述： | IC DECODER/ENCODER DGTL 100-LQFP |
| 標(biāo)準(zhǔn)包裝： | 90 |
| 類型： | 音頻編碼器/解碼器 |
| 應(yīng)用： | 移動(dòng)電話，手機(jī)，視頻顯示器 |
| 電壓 - 電源，數(shù)字： | 1.65 V ~ 3.6 V |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 100-LQFP |
| 供應(yīng)商設(shè)備封裝： | 100-LQFP（14x14） |
| 包裝： | 托盤 |
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70
AT85C51SND3B
7632D–MP3–01/07
It is important to stop the Timer/Counter before changing modes.
Table 80. Timer/counter 1 Operating Modes
Mode 0 (13-bit Timer)
Mode 0 configures Timer 1 as a 13-bit Timer, which is set up as an 8-bit Timer (TH1 reg-
ister) with a modulo-32 prescaler implemented with the lower 5 bits of the TL1 register
(see Figure 32). The upper 3 bits of TL1 register are ignored. Prescaler overflow incre-
ments TH1 register.
Mode 1 (16-bit Timer)
Mode 1 configures Timer 1 as a 16-bit Timer with TH1 and TL1 registers connected in
cascade (see Figure 34). The selected input increments TL1 register.
Mode 2 (8-bit Timer with Auto-
Reload)
Mode 2 configures Timer 1 as an 8-bit Timer (TL1 register) with automatic reload from
TH1 register on overflow (see Figure 36). TL1 overflow sets TF1 flag in TCON register
and reloads TL1 with the contents of TH1, which is preset by software. The reload
leaves TH1 unchanged.
Mode 3 (Halt)
Placing Timer 1 in mode 3 causes it to halt and hold its count. This can be used to halt
Timer 1 when TR1 run control bit is not available i.e. when Timer 0 is in mode 3.
Interrupt
Each Timer handles one interrupt source that is the timer overflow flag TF0 or TF1. This
flag is set every time an overflow occurs. Flags are cleared when vectoring to the Timer
interrupt routine. Interrupts are enabled by setting ETx bit in IEN0 register. This
assumes interrupts are globally enabled by setting EA bit in IEN0 register.
Figure 41. Timer Interrupt System
M11
M01
Mode
Operation
0
8-bit Timer/Counter (TH1) with 5-bit prescaler (TL1).
0
1
16-bit Timer/Counter.
1
0
2
8-bit auto-reload Timer/Counter (TL1).
1
3
Timer/Counter halted. Retains count.
TF0
TCON.5
ET0
IEN0.1
Timer 0
Interrupt Request
TF1
TCON.7
ET1
IEN0.3
Timer 1
Interrupt Request
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| AT85C51SND3B2-RTTUL | 功能描述:音頻 DSP Microcontroller RoHS:否 制造商:Texas Instruments 工作電源電壓: 電源電流: 工作溫度范圍: 安裝風(fēng)格: 封裝 / 箱體: 封裝:Tube |
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