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參數(shù)資料
| 型號： | HT49C10 |
| 廠商： | Holtek Semiconductor Inc. |
| 元件分類： | 8位微控制器 |
| 英文描述： | 8-BIT MICROCONTROLLER |
| 中文描述： | 8位微控制器 |
| 文件頁數(shù)： | 21/47頁 |
| 文件大?。?/td> | 329K |
| 代理商： | HT49C10 |
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HT49C10
21
September 28, 1999
Label (TMRC)
Bits
Function
0~2
Unused bits, read as 0
TE
3
Defines the TMR active edge of the timer/event counter
(0=active on low to high; 1=active on high to low)
TON
4
Enable/disable timer counting
(0=disabled; 1=enabled)
TN2
5
Two to one multiplexer control inputs to select the timer/event counter
clock source (0=RTC output; 1=system clock or system clock/4)
TN0, TN1
7, 6
Defines the operating mode
01=Event count mode (external clock)
10=Timer mode (internal clock)
11=Pulse Width measurement mode (external clock)
00=Unused
TMRC register
the TON can only be reset by instructions. The
overflow of the timer/event counter is one of the
wake-up sources and can also be applied to a
PFD (Programmable Frequency Divider) out-
put at PA3 by mask option. No matter what the
operation mode is, writing a 0 to ETI disables the
interrupt service. When the PFD function is se-
lected, executing CLR [PA].3 instruction to en-
able PFD output and executing
instruction to disable the PFD output.
SET [PA].3
In the case of timer/event counter OFF
condition,writingdatatothetimer/eventcounter
preload register also reloads that data to the
timer/event counter. But if the timer/event coun-
ter is turned on, data written to the
timer/event counter is kept only in the
timer/event counter preload register. The
timer/event counter still goes on operating un-
til an overflow occurs.
When the timer/event counter (reading TMR)
is read, the clock is blocked to avoid errors. As
this may results in a counting error, this
should be taken into account by the program-
mer.
It is strongly recommended to load first a spe-
cific value into the TMR register, then turn on
the timer/event counter for proper operation.
Because the initial value of TMR is unknown.
Input/output ports
There is an 8-bit bidirectional input/output port
and a 6-bit input port in the HT49C10, labeled
PA and PB, which are mapped to [12H] and
[14H] of the RAM, respectively. PA0~PA3 can
be configured as CMOS (output) or NMOS (in-
put/output) and with or without pull-high resis-
tor by mask option, PA4~PA7 always pull-high
and NMOS (input/output). PB can only be used
for input operation, and each bit on the port
with pull-high resistor. Both are for the input
operation, these ports are non-latched, that is,
the inputs should be ready at the T2 rising edge
of the instruction
MOV A, [m]
14H). For PA output operation, all data are
latched and remain unchanged until the output
latch is rewritten.
(m=12H or
When the structures of PA are open drain
NMOS type, it should be noted that, before
reading data from the pads, a 1 should be
written to the related bits to disable the NMOS
device. That is executing first the instruction
SET[m].i (i=0~7forPA)todisableanyrelated
NMOS device, and then MOV A, [m] to get
stable data.
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PDF描述 |
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| HT49C30L | HDSP-A101 RED DISPLAY, LED, |
| HT49R30 | DISPLAY 7 SEGMENT |
| HT49R30A-1 | DISPL 7 SEG YELLOW |
| HT49C30-1 | 8-Bit LCD Type MCU |
| HT49C50 | 8-BIT MICROCONTROLLER |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| HT49C10(48SSOP) | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Microcontroller |
| HT49C10-1 | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:LCD Type 8-Bit MCU |
| HT49C10-1_12 | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:LCD Type 8-Bit MCU |
| HT49C30-1 | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:8-Bit LCD Type MCU |
| HT49C30-1_12 | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:LCD Type 8-Bit MCU |
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