- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄385399 > HT47C20 (Holtek Semiconductor Inc.) 8-BIT MICROCONTROLLER PDF資料下載
參數(shù)資料
| 型號(hào)： | HT47C20 |
| 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)： | 28/56頁 |
| 文件大小： | 352K |
| 代理商： | HT47C20 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁當(dāng)前第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁
HT47C20
28
January 18, 2000
F
-
F
(
/
/
# -
* * "
#)
!
+
"
!
) ( "
(&
) (*
F
-
F
/
# -
* * "
#
)
!
+
"
!
) ( "
(&
& " (
+ ( "
$ ( /
+ "
+ ( "
$ ( /
+ "
(
/
& " (
PA0/BZ, PA1/BZ input/output port
Input/output ports
There are 8-bit bidirectional input/output port
and4-bitinputportintheHT47C20,labeledPA
and PB which are mapped to the data memory
of [12H] and [14H] respectively. The high nibble
of the PA is NMOS output and input with
pull-high resisters. The low nibble of the PAcan
be used for input/output or output operation by
selecting NMOS or CMOS output by mask op-
tion. Each bit on the PA can be configured as a
wake-up input, and the low nibble of the PA
with or without pull-high resistor by mask op-
tion. PB can only be used for input operation,
and each bit on the port can be configured with
pull high resistor by mask option. 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] (m=12H or 14H). For PAoutput operation,
all data are latched and remain unchanged un-
til the output latch is rewritten.
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 done first before executing the
instruction MOV A, 0FFH and MOV [12H],
A to disable related NMOS device, and then
MOV A, [12H] to get stable data.
After chip reset, these input lines remain at a
high level or are left floating (by mask option).
Some instructions first input data and then fol-
low the output operations. For example, SET
[m].i , CLR [m].i , CPL [m] , CPLA[m] read
the entire port states into the CPU, execute the
defined operations (bit-operation), and then
write the results back to the latches or to the ac-
cumulator. Each bit of the PA output latches
can not use these instruction, which may
change the input lines to output lines (when in-
put line is at low level).
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| HT47R20 | 8 位R-F 型OTP 單片機(jī) |
| HT48C05 | Cost-Effective I/O Type 8-Bit MCU |
| HT48C06 | Cost-Effective I/O Type 8-Bit MCU |
| HT48C10-1 | 8-Bit High Performance RISC-like Microcontroller Suitable for Multiple I/O Application(高性能、指令類似RISC的8位微控制器，用于多I/O接口設(shè)備) |
| HT48C50-1 | 8-Bit High Performance RISC-like Microcontroller Suitable for Multiple I/O Application(高性能、指令類似RISC的8位微控制器，用于多I/O接口設(shè)備) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| HT47C20_02 | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:8-Bit R-F Type Mask MCU |
| HT47C20-1 | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:R-F Type 8-Bit MCU |
| HT47C20-1_08 | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:R-F Type 8-Bit MCU |
| HT47C20L | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:8-Bit Microcontroller |
| HT47C20L_05 | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:R-F Type Low Voltage 8-Bit Mask MCU |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。