LOGIC COMMANDS AND REGISTERS Interrupt Regi" />
參數(shù)資料
型號: KIT33989DWEVB
廠商: Freescale Semiconductor
文件頁數(shù): 35/72頁
文件大?。?/td> 0K
描述: KIT EVAL 33989DW HS SBC
標(biāo)準(zhǔn)包裝: 1
主要目的: 接口,CAN 控制器
嵌入式: 是,MCU,8 位
已用 IC / 零件: MC33989
主要屬性: CAN 2.0 系統(tǒng)基礎(chǔ)芯片(SBC),SPI 接口,2 低壓降穩(wěn)壓器
次要屬性: 故障檢測,睡眠和待機(jī)模式
已供物品: 板,CD
相關(guān)產(chǎn)品: MC33989DWR2CT-ND - IC SYSTEM BASE W/CAN 28-SOIC
MC33989DWR2TR-ND - IC SYSTEM BASE W/CAN 28-SOIC
MC33989DW-ND - IC SYSTEM BASE W/CAN 28-SOIC
Analog Integrated Circuit Device Data
40
Freescale Semiconductor
33989
FUNCTIONAL DEVICE OPERATION
LOGIC COMMANDS AND REGISTERS
Interrupt Register (INT)
This register allows masking or enabling the interrupt source. A read operation informs about the interrupt source.
When the mask bit is set, INT pin goes low if the appropriate condition occurs.
If HS1OT - V2LOW interrupt is only selected (only bit D2 set in INT register), reading INT register bit D2 leads to two possibilities:
1. Bit D2 = 1: INT source is HS1OT
2. Bit D2 = 0: INT source is V2LOW
HS1OT and V2LOW bits status are available in IOR.
Upon a wake-up condition from Stop mode due to overcurrent detection (IDD1SW-U1 or IDD1S-WU2), an INT pulse is generated;
however, INT register content remains at 0000 (not bit set into the INT register).
The status bit of the INT register content is a copy of the IOR and CAN registers status content. To clear the INT register bit
the IOR and/or CAN register must be cleared (read register). Once this operation is done at IOR and CAN register the INT register
is updated.
Errors bits are latched in the CAN register and IOR.
Table 32. INT Register
INT
D3
D2
D1
D0
$111B
W
VSUPLOW
HS1OT-V2LOW
VDDTEMP
CANF
R
VSUPLOW
HS1OT
VDDTEMP
CANF
Reset Value
0
Reset Condition
POR, RST
Table 33. INT Control Bits
Control Bit
Description
CANF
Mask Bit for CAN Failures
VDDTEMP
Mask Bit for VDD Medium Temperature (Pre-warning)
HS1OT - V2LOW
Mask Bit for HS1 Overtemperature AND V2 Below 4.0 V
VSUPLOW
Mask Bit for VSUP Below 6.1 V
Table 34. INT Status Bits
Status Bit
Description
CANF
CAN Failure
VDDTEMP
VDD Medium Temperature (pre-warning)
HS1OT
HS1 Overtemperature
VSUPLOW
VSUP Below 6.1 V
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