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參數(shù)資料

型號：	MTA81010-LPI/P
元件分類：	微控制器/微處理器
英文描述：	8-BIT, OTPROM, 4 MHz, RISC MICROCONTROLLER, PDIP28
封裝：	PLASTIC, DIP-28
文件頁數(shù)：	69/76頁
文件大?。?/td>	745K
代理商：	MTA81010-LPI/P

1995 Microchip Technology Inc.

DS39005D-page 71

MTA81010

List of Examples

Example 3-1: Changing Prescaler (TMR0

→WDT) ........... 10

Example 3-2: Changing Prescaler (WDT

→TMR0) ........... 10

Example 3-3: Indirect Addressing ..................................... 17

Table of Figures

Figure 2-1:

MTA81010 Microcontroller

Chip Block Diagram ...................................... 5

Figure 2-2:

Clocks/Instruction cycle ................................ 6

Figure 3-1:

TMR0 Block Diagram.................................... 7

Figure 3-2:

Electrical Structure of T0CKI Pin .................. 7

Figure 3-3:

TMR0 Timing: Internal Clock/No Prescale.... 8

Figure 3-4:

TMR0 Timing: Internal Clock/Prescale 1:2 ... 8

Figure 3-5:

TIMER0 Timing With External Clock ............ 9

Figure 3-6:

Block Diagram of the TMR0/WDT

Prescaler....................................................... 9

Figure 3-7:

Program Memory Organization................... 12

Figure 3-8:

Data Memory Map ...................................... 13

Figure 3-9:

Status Register ........................................... 15

Figure 3-10:

Option Register........................................... 16

Figure 3-11:

Direct/Indirect Addressing........................... 17

Figure 4-1:

Equivalent Circuit for a single i/0 pin........... 20

Figure 4-2:

I/O Port Read/Write Timing......................... 21

Figure 6-1:

I/O Port Read/Write Timing......................... 22

Figure 8-1:

Block Diagram T0CKI/WDT Prescaler........ 24

Figure 11-1:

Crystal Operation or Ceramic Resonator

(XT or LP Types Only) ................................ 34

Figure 11-2:

External Clock Input Operation (XT or LP

Types Only) ................................................ 34

Figure 11-3:

RC Oscillator (RC Type Only)..................... 34

Figure 12-1:

External Power On Reset Circuit ................ 35

Figure 12-2:

Brown Out Protection Circuit ...................... 35

Figure 12-3:

Brown Out Protection Circuit ...................... 35

Figure 12-4:

Simplified Power On Reset Block Diagram 36

Figure 12-5:

Using External Reset Input ......................... 36

Figure 12-6:

Using On-Chip por (Fast VDD Rise Time) ... 36

Figure 12-7:

Using On-Chip por (Slow vDD Rise Time)... 37

Figure 15-1:

Load Conditions.......................................... 45

Figure 15-2:

CLKOUT and I/O Timing............................. 47

Figure 15-3:

Reset, Watchdog Timer, and Device Reset

Timer Timing............................................... 48

Figure 15-4:

TIMER0 Clock Timings ............................... 49

Figure 16-1:

Typical RC Oscillator Frequency vs.

Temperature ............................................... 50

Figure 16-2:

Typical RC Oscillator Frequency vs. VDD ... 51

Figure 16-3:

Typical RC Oscillator Frequency vs. VDD ... 51

Figure 16-4:

Typical RC Oscillator Frequency vs. VDD ... 51

Figure 16-5:

Typical IPD vs. VDD Watchdog

Disabled 25

°C............................................. 52

Figure 16-6:

Maximum IPD vs. VDD Watchdog

Disabled...................................................... 53

Figure 16-7:

Typical IPD vs. VDD Watchdog

Enabled 25

°C.............................................. 53

Figure 16-8:

Maximum IPD vs. VDD Watchdog

Enabled....................................................... 54

Figure 16-9:

VTH (Input Threshold Voltage)

of I/O Pins vs. VDD ...................................... 54

Figure 16-10: VIH, VIL of MCLR, T0CKI and OSC1

(in RC Mode) vs. VDD ................................. 54

Figure 16-11: VTH (Input Threshold Voltage)

of I/O Pins vs. VDD ...................................... 54

Figure 16-12: Typical IDD vs. Frequency

(External Clock 25

°C) ................................. 55

Figure 16-13: Maximum IDD vs. Frequency

(External Clock -40

°C to +85°C)................. 55

Figure 16-14: Maximum IDD vs. Frequency

(External Clock -55

°C to +125°C) .............. 56

Figure 16-15: WDT Timer Time-out Period vs. VDD ......... 56

Figure 16-16: Transconductance (gm)

of HS Oscillator vs. VDD ............................. 56

Figure 16-17: Transconductance (gm)

of LP Oscillator vs. VDD .............................. 57

Figure 16-18: IOH vs. VOH, VDD = 3V................................ 57

Figure 16-19: Transconductance (gm)

of XT Oscillator vs. VDD.............................. 57

Figure 16-20: IOH vs. VOH, VDD = 5V................................ 57

Figure 16-21: IOL vs. VOL, VDD = 3V................................. 58

Figure 16-22: IOL vs. VOL, VDD = 5V................................. 58

Figure 17-1:

Serial EEPROM Block Diagram ................. 59

Figure 19-1:

Data Transfer Sequence on the Serial Bus 61

Figure 19-2:

Control Byte Allocation ............................... 62

Figure 19-3:

Byte Write ................................................... 63

Figure 19-4:

Page Write.................................................. 63

Figure 19-5:

Current Address Read................................ 64

Figure 19-6:

Random Read ............................................ 64

Figure 19-7:

Sequential Read......................................... 64

Figure 20-1:

Bus Timing Start/Stop ................................ 67

Figure 20-2:

Bus Timing Data......................................... 68

Table of Tables

Table 1-1:

Overview ...................................................... 4

Table 2-1:

Microcontroller Pin Functions ....................... 5

Table 3-1:

Summary of TMR0 Registers ..................... 10

Table 3-2:

Registers Associated With TMR0............... 10

Table 3-3:

MTA81010 Register File Summary ............ 14

Table 3-4:

Program Counter Stack Width.................... 18

Table 3-5:

Events Affecting TO/PD Status Bits ........... 19

Table 3-6:

TO/PD Status After Reset .......................... 19

Table 9-1:

Instruction Set Summary ............................ 26

Table 11-1:

Capacitor Selection

for Ceramic Resonators ............................. 34

Table 11-2:

Capacitor Selection for Crystal Oscillator... 34

Table 15-1:

Cross Reference of Device Specs

for Oscillator Configurations

and Frequencies of Operation

(Commercial Devices) ................................ 40

Table 15-2: