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參數(shù)資料
| 型號(hào)： | HT36A2 |
| 廠商： | Holtek Semiconductor Inc. |
| 英文描述： | 8-Bit Music Synthesizer MCU |
| 中文描述： | 8位微控制器音樂合成器 |
| 文件頁數(shù)： | 7/24頁 |
| 文件大?。?/td> | 215K |
| 代理商： | HT36A2 |
HT36A2
Rev. 1.00
7
June 19, 2003
other type is for wavetable code, which is addressed by
the start address ST11~0. On the program type,
2
13
+ PC12~0. On the wave table
WA15~0= PF2~0
ROM type, WA15~0=ST11~0
2
5
.
Program Memory
ROM
The program memory is used to store the program in-
structions which are to be executed. It also contains
data, table, and interrupt entries, and is organized into
8192 16 bits, addressed by the bank pointer, program
counter and table pointer.
Certain locations in the program memory of each bank
are reserved for special usage:
Location 000H on bank0
This area is reserved for the initialization program. Af-
ter chip reset, the program always begins execution at
location 000H on bank0.
Location 008H
This area is reserved for the Timer Counter 0 interrupt
service program on each bank. If timer interrupt results
from a timer counter 0 overflow, and if the interrupt is
enabled and the stack is not full, the program begins ex-
ecution at location 008H corresponding to its bank.
Location 00CH
This area is reserved for the Timer Counter 1 interrupt
service program on each bank. If a timer interrupt re-
sults from a Timer Counter 1 overflow, and if the inter-
rupt is enabled and the stack is not full, the program
begins execution at location 00CH corresponding to
its bank.
Table location
Any location in the ROM space can be used as
look-up tables. The instructions TABRDC [m] (the cur-
rent page, 1 page=256 words) and TABRDL [m] (the
last page) transfer the contents of the lower-order
byte to the specified data memory, and the
higher-order byte to TBLH (08H). Only the destination
of the lower-order byte in the table is well-defined, the
higher-order byte of the table word are transferred to
the TBLH. The Table Higher-order byte register
(TBLH) is read only. The Table Pointer (TBLP) is a
read/write register (07H), which indicates the table lo-
cation. Before accessing the table, the location must
be placed in TBLP. The TBLH is read only and cannot
be restored. If the main routine and the ISR (Interrupt
Service Routine) both employ the table read instruc-
tion, the contents of the TBLH in the main routine are
likely to be changed by the table read instruction used
in the ISR. Errors can occur. In this case, using the ta-
ble read instruction in the main routine and the ISR si-
multaneously should be avoided. However, if the
table read instruction has to be applied in both the
main routine and the ISR, the interrupt should be dis-
abled prior to the table read instruction. It will not be
enabled until the TBLH has been backed up. All table
related instructions need 2 cycles to complete the op-
eration. These areas may function as normal program
memory depending upon user requirements.
Bank pointer
The program memory is organized into 8 banks and
each bank into 8192
PF[2~0] is used as the bank pointer. After an instruc-
tion has been executed to write data to the PF register
to select a different bank, note that the new bank will
not be selected immediately. It is not until the following
instruction has completed execution that the bank will
be actually selected. It should be note that the PF reg-
isterhastobeclearedbeforesettingtooutputmode.
16 bits of program ROM.
Wavetable ROM
The ST[11~0] is used to defined the start address of
each sample on the wavetable and read the waveform
data from the location. HT36A2 provides 16 output ad-
dress lines from WA[15~0], the ST[11~0] is used to lo-
Instruction(s)
Table Location
*12
*11
*10
*9
*8
*7
*6
*5
*4
*3
*2
*1
*0
TABRDC [m]
P12
P11
P10
P9
P8
@7
@6
@5
@4
@3
@2
@1
@0
TABRDL [m]
1
1
1
1
1
@7
@6
@5
@4
@3
@2
@1
@0
Table location
Note:
*12~*0: Bits of table location
@7~@0: Bits of table pointer
P12~P8: Bits of current Program Counter
2
2
, 9
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9
(
= : : 4
(
( & +
( > :
)
2
= : : 4
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)
. . . 2
- :
@ ( (
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( ; : 9 (
( : ( . 5
. . 2
, 9
(
:
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(
:
2
$
A 0
(
3
:
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9
Program memory for each bank
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相關(guān)代理商/技術(shù)參數(shù) |
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| HT36A3 | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:8-Bit Music Synthesizer MCU |
| HT36A4 | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:Music Synthesizer 8-Bit MCU |
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| HT36ARP | 功能描述:兩端交流開關(guān)元件 32-40V RoHS:否 制造商:STMicroelectronics 轉(zhuǎn)折電流 VBO:45 V 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOT-23 封裝:Reel |
| HT36B | 功能描述:兩端交流開關(guān)元件 34-38V RoHS:否 制造商:STMicroelectronics 轉(zhuǎn)折電流 VBO:45 V 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOT-23 封裝:Reel |
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