- 您现在的位置：买卖IC网 > PDF目录16447 > KIT33975AEWEVBE (Freescale Semiconductor)KIT EVALUATION FOR MC33975 PDF资料下载
参数资料
| 型号： | KIT33975AEWEVBE |
| 厂商： | Freescale Semiconductor |
| 文件页数： | 9/32页 |
| 文件大小： | 0K |
| 描述： | KIT EVALUATION FOR MC33975 |
| 标准包装： | 1 |
| 主要目的： | 接口，开关探测 |
| 嵌入式： | 否 |
| 已用 IC / 零件： | MC33975 |
| 主要属性： | 8 可编程输入（电池开关或接地开关） |
| 次要属性： | 14 开关至接地输入 |
| 已供物品： | 板，CD |
第1页第2页第3页第4页第5页第6页第7页第8页当前第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页
Analog Integrated Circuit Device Data
Freescale Semiconductor
17
33975
FUNCTIONAL DEVICE OPERATION
OPERATIONAL MODES
WAKE-UP/INTERRUPT REGISTER
The Wake-up/Interrupt Register defines the inputs that are
allowed to wake the 33975 from Sleep mode or set the INT
pin low in Normal mode. Programming the wake-up/interrupt
bit to logic [0] will disable the specific input from generating
an interrupt and will disable the specific input from waking the
IC in Sleep mode (refer to Table 7). Programming the wake-
up/interrupt bit to logic [1] will enable the specific input to
generate an interrupt with switch change of state and will
enable the specific input as wake-up. The MCU may change
or update the Wake-up/Interrupt Register via software at any
time in Normal mode.
WETTING CURRENT REGISTER
The 33975 has two levels of switch-to-ground contact
current, 32 and 4.0 mA, and two levels of switch-to-battery
contact current, 16 and 2.0 mA (see Figure 11). The metallic
command is used to set the switch contact current level (refer
to Table 8). Programming the metallic bit to logic [0] will set
the switch wetting current to 2.0 mA/4.0 mA. Programming
the metallic bit to logic [1] will set the switch contact wetting
current to 16 mA/32 mA. The MCU may change or update the
Wetting Current Register via software at any time in Normal
Mode.
Wetting current is designed to provide higher levels of current
during switch closure. The higher level of current is designed
to keep switch contacts from building up oxides that form on
the switch contact surface.
Figure 11. Contact Wetting and Sustain Current
for Switch-to-Ground Input
WETTING CURRENT TIMER REGISTER
Each switch input has a designated 20 ms timer. The timer
starts when the specific switch input crosses the comparator
threshold (4.0 V). When the 20 ms timer expires, the contact
current is reduced from 16 to 2.0 mA for switch-to-battery
inputs and 32 to 4.0 mA for switch-to-ground inputs. The
wetting current timer may be disabled for a specific input.
When the timer is disabled, wetting current will continue to
flow through the closed switch contact. With multiple wetting
current timers disabled, power dissipation for the IC must be
considered.
The MCU may change or update the Wetting Current Timer
Register via software at any time in Normal mode. This allows
the MCU to control the amount of time wetting current is
applied to the switch contact. Programming the wetting
current timer bit to logic [0] will disable the wetting current
timer. Programming the wetting current timer bit to logic [1]
will enable the wetting current timer (refer to Table 9).
Table 7. Wake-Up /Interrupt Command
Wake-up/Interrupt Command
Command Bits
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
1
0
X
sp7 sp6 sp5 sp4 sp3 sp2 sp1 sp0
0
1
X
sg1
3
sg1
2
sg1
1
sg1
0
sg9 sg8 sg7 sg6 sg5 sg4 sg3 sg2 sg1 sg0
Switch Contact Voltage
32 mA Switch Wetting Current
4.0 mA Switch Sustain Current
20 ms Wetting Current Timer
Table 8. Metallic Command
Metallic Command
Command Bits
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
1
0
X
sp7 sp6 sp5 sp4 sp3 sp2 sp1 sp0
0
1
0
1
X
sg1
3
sg1
2
sg1
1
sg1
0
sg9 sg8 sg7 sg6 sg5 sg4 sg3 sg2 sg1 sg0
相关PDF资料 |
PDF描述 |
|---|---|
| M3WWK-1006J | IDC CABLE - MPL10K/MC10G/MPL10K |
| 608037-000 | SHIELD TERMINATOR SOLDER SLEEVE |
| L-15W56NKV4E | WIREWOUND INDUCTOR 56NH 0805 |
| M3KKK-1006J | IDC CABLE - MPK10K/MC10G/MPK10K |
| RBB20DHLN | CONN EDGECARD 40POS DIP .050 SLD |
相关代理商/技术参数 |
参数描述 |
|---|---|
| KIT33982CEVBE | 功能描述:电源管理IC开发工具 2.0 M HIGH-SIDE SW RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| KIT33982PNAEVB | 功能描述:电源管理IC开发工具 SPSS HIGH-SIDE SWTCH RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| KIT33984CEVBE | 功能描述:电源管理IC开发工具 4.0 M HIGH-SIDE SW RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| KIT33984PNAEVB | 功能描述:电源管理IC开发工具 33984 - SPD4 EVAL KIT RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| KIT33988CEVBE | 功能描述:电源管理IC开发工具 HIGH SIDE SWITCH (8.0M) RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
发布紧急采购，3分钟左右您将得到回复。