参数资料
型号: MAX7349AWG
厂商: MAXIM INTEGRATED PRODUCTS INC
元件分类: 微控制器/微处理器
英文描述: SPECIALTY MICROPROCESSOR CIRCUIT, PDSO24
封装: 0.300 INCH, MS-013AD, SOIC-24
文件页数: 13/28页
文件大小: 760K
代理商: MAX7349AWG
MAX7347/MAX7348/MAX7349
2-Wire Interfaced Low-EMI Key Switch and
Sounder Controllers
20
______________________________________________________________________________________
REGISTER DATA
REGISTER
ADDRESS
CODE (hex)
READ
WRITE
D7
D6
D5
D4
D3
D2
D1
D0
READ
PORT 7 PORT 6 PORT 5 PORT 4 PORT 3 PORT 2
INT
PORT
ALERT
INPUT
PORTS REGISTER
0x05
WRITE
PORT 7 PORT 6 PORT 5 PORT 4 PORT 3 PORT 2
INT
PORT
X
Clear port 7 low
0x05
Write
0
X
Set port 7 high (high
impedance)
0x05
Write
1
X
Clear INT port low;
this setting is ignored
unless the key-scan INT
functionality is disabled
by setting interrupt
register bits D4 to D0 to
00000
0x05
Write
X
0
X
Set INT port high (high
impedance); this setting
is ignored unless the
key-scan INT
functionality is disabled
by setting interrupt
register bits D4 to D0 to
00000
0x05
Write
X
1
X
Alert input level is low
0x05
Read
X
0
Alert input level is high
0x05
Read
X
1
Power-up default
setting
0x05
111
1
111
X
Table 13. Ports Register Format (continued)
REGISTER DATA
REGISTER
ADDRESS
CODE (hex)
D7
D6
D5
D4
D3
D2
D1
D0
This-8 bit value is passed to sounder controller when key(s)
debounced, if enabled in the configuration register; these 7
bits define duration and frequency only; sounder command
bit D0 is ignored and fixed internally at 1; if a key sound is
sent as 000xxxxx (continuous), then the command is stored
as 111xxxxx (1000 ms)
0x06
7-bit value (see Table 16 for functionality)
1
Power-up default setting
0x06
01
000
1
Table 14. Key-Sound Register Format
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