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參數資料
| 型號： | MC68B912B32 |
| 廠商： | Motorola, Inc. |
| 英文描述： | 2.5V 100ppm/Degrees C, 50uA in SOT23-3 Series (Bandgap) Voltage Reference 3-SOT-23 -40 to 125 |
| 中文描述： | 16位微控制器 |
| 文件頁數： | 74/128頁 |
| 文件大小： | 748K |
| 代理商： | MC68B912B32 |
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MOTOROLA
74
MC68HC912B32
MC68HC912B32TS/D
12.1 Timer Registers
Input/output pins default to general-purpose I/O lines until an internal function which uses that pin is
specifically enabled. The timer overrides the state of the DDR to force the I/O state of each associated
port line when an output compare using a port line is enabled. In these cases the data direction bits will
have no affect on these lines.
When a pin is assigned to output an on-chip peripheral function, writing to this PORTTn bit does not
affect the pin but the data is stored in an internal latch such that if the pin becomes available for general-
purpose output the driven level will be the last value written to the PORTTn bit.
Read or write anytime.
IOS[7:0] — Input Capture or Output Compare Channel Configuration
0 = The corresponding channel acts as an input capture
1 = The corresponding channel acts as an output compare.
Read anytime but will always return $00 (1 state is transient). Write anytime.
FOC[7:0] — Force Output Compare Action for Channel 7-0
A write to this register with the corresponding data bit(s) set causes the action which is programmed for
output compare “n” to occur immediately. The action taken is the same as if a successful comparison
had just taken place with the TCn register except the interrupt flag does not get set.
Read or write anytime.
The bits of OC7M correspond bit-for-bit with the bits of timer port (PORTT). Setting the OC7Mn will set
the corresponding port to be an output port regardless of the state of the DDRTn bit when the corre-
sponding TIOSn bit is set to be an output compare. This does not change the state of the DDRT bits.
Read or write anytime.
The bits of OC7D correspond bit-for-bit with the bits of timer port (PORTT). When a successful OC7
compare occurs, for each bit that is set in OC7M, the corresponding data bit in OC7D is stored to the
corresponding bit of the timer port.
TIOS
— Timer Input Capture/Output Compare Select
$0080
Bit 7
6
5
4
3
2
1
Bit 0
IOS7
IOS6
IOS5
IOS4
IOS3
IOS2
IOS1
IOS0
RESET:
0
0
0
0
0
0
0
0
CFORC
— Timer Compare Force Register
$0081
Bit 7
6
5
4
3
2
1
Bit 0
FOC7
FOC6
FOC5
FOC4
FOC3
FOC2
FOC1
FOC0
RESET:
0
0
0
0
0
0
0
0
OC7M
— Output Compare 7 Mask Register
$0082
Bit 7
6
5
4
3
2
1
Bit 0
OC7M7
OC7M6
OC7M5
OC7M4
OC7M3
OC7M2
OC7M1
OC7M0
RESET:
0
0
0
0
0
0
0
0
OC7D
— Output Compare 7 Data Register
$0083
Bit 7
6
5
4
3
2
1
Bit 0
OC7D7
OC7D6
OC7D5
OC7D4
OC7D3
OC7D2
OC7D1
OC7D0
RESET:
0
0
0
0
0
0
0
0
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