參數(shù)資料
型號(hào)： MAX7313DATG+T
廠(chǎng)商： Maxim Integrated Products
文件頁(yè)數(shù)： 9/26頁(yè)
文件大?。?/td> 0K
描述： IC EXPANDER 16PORT 24TQFN
產(chǎn)品培訓(xùn)模塊： Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝： 2,500
接口： I²C
輸入/輸出數(shù)： 16
中斷輸出： 是
頻率 - 時(shí)鐘： 400kHz
電源電壓： 2 V ~ 3.6 V
工作溫度： -40°C ~ 125°C
安裝類(lèi)型： 表面貼裝
封裝/外殼： 24-WFQFN 裸露焊盤(pán)
供應(yīng)商設(shè)備封裝： 24-TQFN-EP（4x4）
包裝： 帶卷 (TR)
The 17th output, O16, is controlled through 2 bits in the
configuration register, which provide the same static or
blink control as the other 16 output ports.
PWM Intensity Control
The MAX7313 includes an internal oscillator, nominally
32kHz, to generate PWM timing for LED intensity con-
trol or other applications such as PWM trim DACs.
PWM can be disabled entirely for all the outputs. In this
case, all outputs are static and the MAX7313 operating
current is lowest because the internal PWM oscillator is
turned off.
The MAX7313 can be configured to provide any combi-
nation of PWM outputs and glitch-free logic outputs.
Each PWM output has an individual 4-bit intensity con-
trol (Table 14). When all outputs are to be used with the
same PWM setting, the outputs can be controlled
together instead using the global intensity control
(Table 13). Table 10 shows how to set up the MAX7313
to suit a particular application.
PWM Timing
The PWM control uses a 240-step PWM period, divided
into 15 master intensity timeslots. Each master intensity
timeslot is divided further into 16 PWM cycles (Figure 11).
The master intensity operates as a gate, allowing the indi-
vidual output settings to be enabled from 1 to 15 timeslots
per PWM period (Figures 12, 13, 14) (Table 13).
Each output’s individual 4-bit intensity control only
operates during the number of timeslots gated by the
master intensity. The individual controls provide 16
intensity settings from 1/16 through 16/16 (Table 14).
Figures 15, 16, and 17 show examples of individual
intensity control settings. The highest value an individ-
ual or global setting can be set to is 16/16. This setting
forces the output to ignore the master control, and fol-
low the logic level set by the appropriate blink phase
register bit. The output becomes a glitch-free static out-
put with no PWM.
Using PWM Intensity Controls with Blink Disabled
When blink is disabled (Table 7), the blink phase 0 reg-
isters specify each output’s logic level during the PWM
on-time (Table 8). The effect of setting an output’s blink
phase 0 register bit to 0 or 1 is shown in Table 11. With
its output bit set to zero, an LED can be controlled with
16 intensity settings from 1/16th duty through fully on,
but cannot be turned fully off using the PWM intensity
control. With its output bit set to 1, an LED can be con-
trolled with 16 intensity settings from fully off through
15/16th duty.
Using PWM Intensity Controls with Blink Enabled
When blink is enabled (Table 7), the blink phase 0 regis-
ters and blink phase 1 registers specify each output’s
logic level during the PWM on-time during the respective
MAX7313
16-Port I/O Expander with LED Intensity
Control, Interrupt, and Hot-Insertion Protection
______________________________________________________________________________________
17
Table 8. Blink Phase 0 Registers
REGISTER DATA
REGISTER
R/
W
ADDRESS
CODE
(HEX)
D7
D6
D5
D4
D3
D2
D1
D0
Write outputs P7–P0 phase 0
0
Read back outputs P7–P0 phase 0
1
0x02
OP7
OP6
OP5
OP4
OP3
OP2
OP1
OP0
Write outputs P15–P8 phase 0
0
Read back outputs P15–P8 phase 0
1
0x03
OP15
OP14
OP13
OP12
OP11
OP10
OP9
OP8
Table 9. Blink Phase 1 Registers
REGISTER DATA
REGISTER
R/
W
ADDRESS
CODE
(HEX)
D7
D6
D5
D4
D3
D2
D1
D0
Write outputs P7–P0 phase 1
0
Read back outputs P7–P0 phase 1
1
0x0A
OP7
OP6
OP5
OP4
OP3
OP2
OP1
OP0
Write outputs P15–P8 phase 1
0
Read back outputs P15–P8 phase 1
1
0x03
OP15
OP14
OP13
OP12
OP11
OP10
OP9
OP8
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MAX7314 制造商:MAXIM 制造商全稱(chēng):Maxim Integrated Products 功能描述:18-Port GPIO with LED Intensity Control, Interrupt, and Hot-Insertion Protection
MAX7314AEG 功能描述:外圍驅(qū)動(dòng)器與原件 - PCI 18-Port GPIO RoHS:否 制造商:PLX Technology 工作電源電壓: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:FCBGA-1156 封裝:Tray
MAX7314AEG+ 功能描述:外圍驅(qū)動(dòng)器與原件 - PCI 18-Port GPIO RoHS:否 制造商:PLX Technology 工作電源電壓: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:FCBGA-1156 封裝:Tray
MAX7314AEG+T 功能描述:外圍驅(qū)動(dòng)器與原件 - PCI 18-Port GPIO RoHS:否 制造商:PLX Technology 工作電源電壓: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:FCBGA-1156 封裝:Tray
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