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参数资料
| 型号： | MC68HC05F4CP |
| 厂商： | MOTOROLA INC |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, MROM, 1.789 MHz, MICROCONTROLLER, PDIP28 |
| 封装： | PLASTIC, DIP-28 |
| 文件页数： | 99/130页 |
| 文件大小： | 2089K |
| 代理商： | MC68HC05F4CP |
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MOTOROLA
7-4
MC68HC05F4
DTMF/MELODY GENERATOR
7
7.3
DMG registers
The DMG has two registers (row frequency control register and column frequency control register)
for row and column frequency selection respectively, and one register (tone control register) for
tone output control and mode selection.
7.3.1
Row and column frequency control registers
FCR4–FCR0 and FCC4–FCC0 control the frequency of the tone signals on the row and the
column paths respectively. The row and column paths are not exactly identical owing to the
presence of the high group pre-emphasis in the column path. In order to avoid the entry of the row
DTMF tone values to the column, and vice versa, the above cases are treated as illegal. The data
validator will disable all outputs when an illegal value is detected. The bit description for DTMF and
responsibility to ensure good programming practice by initialising all registers to contain legal
values for the desired function.
7.3.2
Tone control register (TNCR)
This register controls the internal conguration and tone output timing of the DTMF/melody
generator.
MS1, MS0 — Melody select for operation
The MS0 and MS1 bits control the mode of operation of the DTMF/melody generator. There are
sine wave, square wave 1, square wave 2 and square wave 3 modes. They are specied as shown
in Table 7-3.
When square wave 2 or square wave 3 mode is selected, the TNX pin is activated. The idle state
for TNX is a logic high. The nal state of the TNX pin is still dependant on the values of TGER,
TGEC (see Table 7-4), FCR and FCC bits (when illegal values are input).
Address
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
State
on reset
Row freq. control (FCR)
$000D
0
FCR4
FCR3
FCR2
FCR1
FCR0
undened
Address
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
State
on reset
Column freq. control (FCC)
$000E
0
FCC4
FCC3
FCC2
FCC1
FCC0
undened
Address
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
State
on reset
Tone control (TNCR)
$000F
MS1
MS0
TGER TGEC TNOE
0
0000 0000
TPG
66
05F4Book Page 4 Tuesday, August 5, 1997 1:10 pm
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MC68HC05F5 | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:HCMOS Microcontroller Unit |
| MC68HC05F6 | 制造商:MOTOROLA 制造商全称:Motorola, Inc 功能描述:MCU with DTMF/melody generator |
| MC68HC05F6P | 制造商:未知厂家 制造商全称:未知厂家 功能描述:8-Bit Microcontroller |
| MC68HC05F8 | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:High-density complementary metal oxide semiconductor(HCMOS) microcontroller unit |
| MC68HC05J1 | 制造商:MOTOROLA 制造商全称:Motorola, Inc 功能描述:HCMOS MICROCONTROLLER UNIT |
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