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參數(shù)資料
| 型號(hào)： | LM8333 |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | Keypad Controller with I/O Expansion and ACCESS.bus Host Interface |
| 中文描述： | SPECIALTY MICROPROCESSOR CIRCUIT, BGA49 |
| 封裝： | MICRO, BGA-49 |
| 文件頁數(shù)： | 7/17頁 |
| 文件大小： | 768K |
| 代理商： | LM8333 |
7.0 Device Operation
(Continued)
TABLE 2. Example Sequence of Events
Event Number
1
2
3
4
5
6
7
8
Event Code
0xF1
0xB6
0x71
0x36
0xB4
0x34
0x91
0x00
Event on Input
Wake_INP7
Wake_INP3
Wake_INP7
Wake_INP3
Wake_INP3
Wake_INP3
Wake_INP1
NA
Matrix Node
K_OUT0
K_OUT5
K_OUT0
K_OUT5
K_OUT3
K_OUT3
K_OUT0
NA
Description
Key is pressed
Key is pressed
Key is released
Key is released
Key is pressed
Key is released33
Key is pressed
Indicates end of stored events
7.2 I/O EXPANSION
In addition to keypad scanning, the LM8333 supports vari-
ous I/O expansion options.
7.2.1 PWM Output with Programmable Duty Cycle
The PWM pin may be used either as a pulse-width modu-
lated output driven by a 16-bit timer or as a general-purpose
output pin. In the PWM mode, the low time (T
LO
) and high
time (T
HI
) are programmable between 1 x t
C
and 65K x t
C
cycles in which t
C
is the cycle time (nominally 1 microsec-
ond), as shown in
Figure 3
. The period T
PD
is the sum of T
HI
and T
LO
. The PWM_LO command writes T
LO
, and the PW-
M_HI command writes T
. Operational modes of the PWM
pin are controlled by the PWM_CTL command. Before acti-
vating the PWM output, the T
and T
times must be
initialized.
Figure 4
shows the command formats.
20210604
FIGURE 2. Example Event Codes Loaded in FIFO Buffer
20210605
FIGURE 3. Programmable PWM
L
www.national.com
7
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|---|---|
| LM8333_07 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Mobile I/O Companion Supporting Key-Scan, I/O Expansion, PWM, and ACCESS.bus Host Interface |
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| LM8333FLQ8X | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Mobile I/O Companion Supporting Key-Scan, I/O Expansion, PWM, and ACCESS.bus Host Interface |
| LM8333FLQ8X/NOPB | 功能描述:接口 - 專用 RoHS:否 制造商:Texas Instruments 產(chǎn)品類型:1080p60 Image Sensor Receiver 工作電源電壓:1.8 V 電源電流:89 mA 最大功率耗散: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:BGA-59 |
| LM8333FLQ8Y | 制造商:Texas Instruments 功能描述:Mobile I/O Companion Supporting Key Scan 32-Pin LLP EP |
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