OPERATIONAL MODES Hall-Effect Sensor Input" />
參數(shù)資料
型號: MM908E622ACEK
廠商: Freescale Semiconductor
文件頁數(shù): 28/63頁
文件大?。?/td> 0K
描述: IC HALF-BRIDGE QUAD 54-SOIC
標準包裝: 26
應(yīng)用: 自動鏡像控制
核心處理器: HC08
程序存儲器類型: 閃存(16 kB)
控制器系列: 908E
RAM 容量: 512 x 8
接口: SCI,SPI
輸入/輸出數(shù): 12
電源電壓: 9 V ~ 16 V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 54-BSSOP(0.295",7.50mm 寬)裸露焊盤
包裝: 管件
供應(yīng)商設(shè)備封裝: 54-SOICW-EP
Analog Integrated Circuit Device Data
34
Freescale Semiconductor
908E622
FUNCTIONAL DEVICE OPERATION
OPERATIONAL MODES
Hall-Effect Sensor Input Pin H0
The H0 pin can be configured as general purpose input
(H0MS = 0), or as hall-effect sensor input (H0MS = 1), to be
able to read 3-pin / 2-pin hall sensors or switches.
Figure 18. General Purpose / Hall-effect Sensor Input (H0)
Current Coded Hall sensor Input
H0 is selected as “2-pin Hall sensor input”, if the
corresponding H0MS bit in the H0/L0 Status and Control
Register (HLSCTL) is set. In this mode, the pin current to
GND is monitored by a special sense circuitry. Setting the
H0EN bit in the H0/L0 Status and Control Register, switches
the output to VSUP and enables the sense circuitry. The
result of the sense operation is given by the H0F flag. The
flag is low if the sensed current is higher than the sense
current threshold IHSCT. In this configuration, the HO pin is
protected (current limitation) against a short circuit to GND.
After switching on the hallport (H0EN = “1”), the Hall
sensor needs some time to stabilize the output. In RUN
mode, the software has to take care about waiting for a few
s (40) before sensing the hallflags.
The hallport output current is sensed. In case of an over-
current (short to GND), the hallport over-current flag
(H0OCF) is set and the current is limited. For proper
operation of the current limitation, an external capacitor
(>100 nF) close to the H0 pin is required.
0101
current recopy HS2
0110
current recopy HS3
0111
not used
1000
Chip temperature
1001
VSUP prescaler
1010
Pin A0
1011
Pin A0CST
Table 8. Analog Multiplexer Configuration Bits
SS3
SS2
SS1
SS0
Channel
1100
Pin EC
1101
not used
1110
not used
1111
not used
Table 8. Analog Multiplexer Configuration Bits
SS3
SS2
SS1
SS0
Channel
Current
Sense
H0EN
VSUP
H0EN
H0F
H0MS
VDD
10k
H0
H0PD
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