Rainbow-electronics HT49R70A-1 Manuel d'utilisateur

HT49R70A-18-Bit LCD Type OTP MCURev. 1.00 1 December 4, 2001Features·Operating voltage: 3.0V~5.5V·8 input lines·16 bidirectional I/O lines·Two externa

HT49R70A-1Rev. 1.00 10 December 4, 2001Accumulator - ACCThe accumulator (ACC) is related to the ALU opera-tions. It is also mapped to location 05H of

HT49R70A-1Rev. 1.00 11 December 4, 2001gram which corrupts the desired control sequence, thecontents should be saved in advance.External interrupts ar

HT49R70A-1Rev. 1.00 12 December 4, 2001The Timer/Event Counter 0 interrupt request flag (T0F),external interrupt 1 request flag (EIF1), external inter

HT49R70A-1Rev. 1.00 13 December 4, 2001The WDT time-out period is fixed as fS/216.If the WDT clock source chooses the internal WDT oscil-lator, the ti

HT49R70A-1Rev. 1.00 14 December 4, 2001Real time clock - RTCThe real time clock (RTC) is operated in the same man-ner as the time base that is used to

HT49R70A-1Rev. 1.00 15 December 4, 2001The WDT time-out during HALT differs from other chipreset conditions, for it can perform a ²warm reset² thatres

HT49R70A-1Rev. 1.00 16 December 4, 2001The register states are summarized below:Register Reset (Power On)WDT Time-out(Norma Operation)RESReset(Normal

HT49R70A-1Rev. 1.00 17 December 4, 2001In the event count or timer mode, the timer/event coun-ter starts counting at the current contents in thetimer/

HT49R70A-1Rev. 1.00 18 December 4, 2001T ES y s t e m C l o c kT N 1T N 0T M R 1T N 1T N 0T O NP u l s e W i d t hM e a s u r e m e n tM o d e C

HT49R70A-1Rev. 1.00 19 December 4, 2001Input/output portsThere are two 8-bit bidirectional input/output ports, PAand PC and one 8-bit input port PB. P

Block DiagramHT49R70A-1Rev. 1.00 2 December 4, 2001P r o g r a mC o u n t e rP r o g r a mE P R O MI n s t r u c t i o nR e g i s t e rI n s t r u c t

HT49R70A-1Rev. 1.00 20 December 4, 2001LCD display memoryThe HT49R70A-1 provides an area of embedded datamemory for LCD display. This area is located

HT49R70A-1Rev. 1.00 21 December 4, 2001LCD driver outputThe output number of the HT49R70A-1 LCD driver canbe 41´2or41´3or40´4 by option (i.e., 1/2duty

HT49R70A-1Rev. 1.00 22 December 4, 2001C O M 0 C O M 1 C O M 2 C O M 3 L C D s e g m e n t s O NC O M 2 s i d e l i g h t e dV A V BV CV

HT49R70A-1Rev. 1.00 23 December 4, 2001Low voltage reset/detector functionsThere is a low voltage detector (LVD) and a low voltage reset circuit (LVR)

HT49R70A-1Rev. 1.00 24 December 4, 2001OptionsPull-high selection. This option is to decide whether the pull-high resistance is visible or not on the

Application CircuitsHT49R70A-1Rev. 1.00 25 December 4, 2001O S C 1O S C 2P A 0 ~ P A 7P B 0 ~ P B 7fS Y S/ 4R C o s c i l l a t o r a p p l i c a

Instruction Set SummaryMnemonic DescriptionFlagAffectedArithmeticADD A,[m]ADDM A,[m]ADD A,xADC A,[m]ADCM A,[m]SUB A,xSUB A,[m]SUBM A,[m]SBC A,[m]SBCM

Mnemonic DescriptionFlagAffectedBranchJMP addrSZ [m]SZA [m]SZ [m].iSNZ [m].iSIZ [m]SDZ [m]SIZA [m]SDZA [m]CALL addrRETRET A,xRETIJump unconditionallyS

Instruction DefinitionADC A,[m] Add data memory and carry to the accumulatorDescription The contents of the specified data memory, accumulator and the

AND A,[m] Logical AND accumulator with data memoryDescription Data in the accumulator and the specified data memory perform a bitwise logical_AND op-e

Pin AssignmentHT49R70A-1Rev. 1.00 3 December 4, 2001H T 4 9 R 7 0 A - 1 1 0 0 Q F P - A1234567891 01 11 21 31 41 51 61 71 81 92 02 12 22 32 42

CLR [m].i Clear bit of data memoryDescription The bit i of the specified data memory is cleared to 0.Operation[m].i ¬ 0Affected flag(s)TC2 TC1 TO PD O

CPLA [m] Complement data memory and place result in the accumulatorDescriptionEach bit of the specified data memory is logically complemented (1¢s com

HALT Enter power down modeDescription This instruction stops program execution and turns off the system clock. The contents ofthe RAM and registers ar

MOV A,x Move immediate data to the accumulatorDescription The 8-bit data specified by the code is loaded into the accumulator.OperationACC ¬ xAffected

RET Return from subroutineDescription The program counter is restored from the stack. This is a 2-cycle instruction.OperationPC ¬ StackAffected flag(s

RLC [m] Rotate data memory left through carryDescription The contents of the specified data memory and the carry flag are rotated 1 bit left. Bit 7 re

RRCA [m] Rotate right through carry and place result in the accumulatorDescription Data of the specified data memory and the carry flag are rotated 1

SET [m] Set data memoryDescription Each bit of the specified data memory is set to 1.Operation[m] ¬ FFHAffected flag(s)TC2 TC1 TO PD OV Z AC C¾¾¾¾¾¾¾¾

SUB A,[m] Subtract data memory from the accumulatorDescription The specified data memory is subtracted from the contents of the accumulator, leaving t

SZ [m] Skip if data memory is 0Description If the contents of the specified data memory are 0, the following instruction, fetched duringthe current in

Pin DescriptionPin Name I/O Options DescriptionPA0/BZPA1/BZPA2PA3/PFDPA4~PA7I/OWake-upPull-highor NoneCMOS orNMOSPA0~PA7 constitute an 8-bit bidirecti

XOR A,[m] Logical XOR accumulator with data memoryDescription Data in the accumulator and the indicated data memory perform a bitwise logical Exclu-si

HT49R70A-1Rev. 1.00 41 December 4, 2001Copyright Ó 2001 by HOLTEK SEMICONDUCTOR INC.The information appearing in this Data Sheet is believed to be acc

D.C. CharacteristicsTa=25°CSymbol ParameterTest ConditionsMin. Typ. Max. UnitVDDConditionsVDDOperating Voltage¾¾3.0¾5.5 VIDD1Operating Current (Crysta

A.C. CharacteristicsTa=25°CSymbol ParameterTest ConditionsMin. Typ. Max. UnitVDDConditionsfSYS1System Clock (Crystal OSC)3V¾400¾4000 kHz5V¾400¾8000 kH

HT49R70A-1Rev. 1.00 7 December 4, 2001Functional DescriptionExecution flowThe system clock is derived from either a crystal or anRC oscillator or a 32

HT49R70A-1Rev. 1.00 8 December 4, 2001When a control transfer takes place, an additionaldummy cycle is required.Program memory - EPROMThe program memo

HT49R70A-1Rev. 1.00 9 December 4, 2001Stack register - STACKThe stack register is a special part of the memory usedto save the contents of the PC. The