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数据搜索系统，热门电子元器件搜索 |
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数据搜索系统，热门电子元器件搜索 |
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CS5535 数据表(PDF) 330 Page - National Semiconductor (TI) |
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CS5535 数据表(HTML) 330 Page - National Semiconductor (TI) |
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330 / 555 page  www.national.com 330 Revision 0.8 PIT Register Descriptions (Continued) 5.8.2.8 Port B Control (PIT_PORTBCTL) I/O Address 61h Type R/W Reset Value 00h PIT_PORTBCTL Register Map 76 54 32 10 RSVD OUT2_STS TOGGLE RSVD PIT_CNTR2_ SPKR PIT_CNTR2_ EN PIT_PORTBCTL Bit Descriptions Bit Name Description 7:6 RSVD Reserved. Read 0. Write “don’t care”. 5 OUT2_STS (RO) PIT Counter 2 Out State (Read Only). This bit reflects the current status of the PIT Counter 2 output (OUT2). Write “don’t care”. 4 TOGGLE (RO) Toggle (Read Only). This bit toggles on every falling edge of Counter 1 output (OUT1). Write “don’t care”. 3:2 RSVD Reserved. Read 0. Write “don’t care”. 1PIT_CNTR2_ SPKR PIT Counter 2 (Speaker). 0: Forces speaker output to 0. 1: Allows Counter 2 output (OUT2) to pass to the speaker (i.e., the AC_BEEP signal; a mux option on GPIO1). 0PIT_CNTR2_EN PIT Counter 2 Enable. 0: Sets GATE2 input low. 1: Sets GATE2 input high. |
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