参数资料
型号: AT85C51SND3B1-7FTUL
厂商: Atmel
文件页数: 84/119页
文件大小: 0K
描述: IC DECODER/ENCODER DGTL 100CBGA
标准包装: 90
类型: 音频编码器/解码器
应用: 移动电话,手机,视频显示器
电压 - 电源,数字: 1.65 V ~ 3.6 V
安装类型: 表面贴装
封装/外壳: 100-TFBGA
供应商设备封装: 100-CTBGA(9x9)
包装: 托盘
67
AT85C51SND3B
7632D–MP3–01/07
Figure 32. Timer/Counter x (x = 0 or 1) in Mode 0
Figure 33. Mode 0 Overflow Period Formula
Mode 1 (16-bit Timer)
Mode 1 configures Timer 0 as a 16-bit Timer with TH0 and TL0 registers connected in
cascade (see Figure 34). The selected input increments TL0 register. Figure 35 gives
the overflow period calculation formula when in timer mode.
Figure 34. Timer/Counter x (x = 0 or 1) in Mode 1
Figure 35. Mode 1 Overflow Period Formula
Mode 2 (8-bit Timer with Auto-
Reload)
Mode 2 configures Timer 0 as an 8-bit Timer (TL0 register) that automatically reloads
from TH0 register (see Figure 36). TL0 overflow sets TF0 flag in TCON register and
reloads TL0 with the contents of TH0, which is preset by software. When the interrupt
request is serviced, hardware clears TF0. The reload leaves TH0 unchanged. The next
reload value may be changed at any time by writing it to TH0 register. Figure 37 gives
the auto-reload period calculation formula when in timer mode.
TFx
TCON Reg
0
1
GATEx
TMOD Reg
Overflow
Timer x
Interrupt
Request
C/Tx#
TMOD Reg
THx
(8 bits)
INTx
Tx
TIMx
CLOCK
÷
6
TRx
TCON Reg
TLx
(5 bits)
6 (16384 – (THx, TLx))
TFx
PER=
F
TIMx
TFx
TCON Reg
0
1
GATEx
TMOD Reg
Overflow
Timer x
Interrupt
Request
C/Tx#
TMOD Reg
THx
(8 bits)
INTx
Tx
TIMx
CLOCK
÷
6
TRx
TCON Reg
TLx
(8 bits)
6
(65536 – (THx, TLx))
TFxPER=
F
TIMx
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