參數(shù)資料
型號(hào)： EM73MA89B
英文描述： Advanced Synchronous Rectified Buck MOSFET Drivers with Pre-POR OVP; Temperature Range: -40°C to 85°C; Package: 8-EPSOIC T&R
中文描述： 4，液晶產(chǎn)品位微控制器
文件頁(yè)數(shù)： 17/64頁(yè)
文件大?。?/td> 331K
代理商： EM73MA89B
24
* This specification are subject to be changed without notice.
10.15.2002 (V1.3)
EM73MA89B
4-BIT MICRO-CONTROLLER FOR LCD PRODUCT
Preliminary
INTERRUPT OPERATION
The procedure of interrupt operation:
1. Push PC and all flags to stack.
2. Set interrupt entry address into PC.
3. Set SF = 1.
4. Clear EI to inhibit other interrupts occur.
5. Clear the IL with which interrupt source has already been accepted.
6. Excute interrupt subroutine from the interrupt entry address.
7. CPU accept RTI, restore PC and flags from stack. Set EI to accept other interrupt requests.
PROGRAM EXAMPLE: To enable interrupt of "INT0, TRGA"
LDIA
#0100B ;
EXAE
; set mask register "0100b"
EICIL
010111B ; enable interrupt F.F. and clear IL3 and IL5
INTERRUPT SOURCE SELECTION REGISTER
P14
3
2
1
0
Initial value : 0000
ACT WKS SINT CPUS
P14.1 is the interrupt source selection register for speech ending interrupt (SPI) and high speed counter
overflow interrupt (HTCI) selection. When SINT=0, the program address "0004H" is the interrupt entry
address of SPI. When SINT=1, the program address "0004H" is the interrupt entry address of HTCI.
P14.0 and P14.2 are the CPU flages (refer to system operation mode). P14.3 is the speech acknowledge
signal (refer to speech synthesizer control).
HIGH SPEED COUNTER
EM73MA89B has one high speed counter for resistor to frequency oscillation mode, melody mode and auto
load
timer mode. This function is available for the DUAL and SLOW operation mode. The resistor to frequency
oscillation (RFO) circuit as show below :
P4.0(RX)
P4.2(RY)
P4.3(RZ)
P18(1..0)
MUX
Resistor
to
frequency
oscillator
Counter
FRF
P18(3..2)
FRF/2X
P13
P12
8-bit Counter
Rate
Mode
P20(1..0)
P20(3..2)
clock
rate
gating
rate
HTCI interrupt
TCB
VCR
P17
PWM ckt or D/A
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