參數(shù)資料
型號(hào)： UPD784915AGF
廠商： NEC Corp.
英文描述： 16-BIT SINGLE-CHIP MICROCONTROLLERS
中文描述： 16位單晶片微控制器
文件頁(yè)數(shù)： 53/86頁(yè)
文件大?。?/td> 446K
代理商： UPD784915AGF
μ
PD784915A, 784916A
53
(3) Macro service type A
When an interrupt occurs, data is transferred from an 8-/16-bit SFR to memory (byte/word) or from memory (byte/
word) to an 8-/16-bit SFR.
Data is transferred the number of times set in advance by the macro service counter.
This mode can be used to store the result of A/D conversion or for automatic transfer (or reception) by the serial
interface.
Because transfer data is stored at an address FE00H to FEFFH, if only a small quantity of data is to be transferred,
the data can be transferred at high speeds.
When the value of the macro service counter is decremented to 0, a vector interrupt occurs.
(4) Data pattern identification mode (VISS detection mode)
This mode of macro service is for detection of the VISS signal and is used in combination with a pulse width
detection circuit.
When an interrupt occurs, the content of bit 7 of an SFR (usually, TMC3) specified by SFR pointer 1 is shifted
into the buffer area. At the same time, the data in the buffer area is compared with the data in the compare area.
If the two data coincide, an interrupt request is generated. When the value of the macro service counter is
decremented to 0, a vector interrupt occurs.
It can be specified by option that the value of an SFR (usually, CPT30) specified by SFR pointer 2 be multiplied
by a coefficient and the result of this multiplication be stored to an SFR (usually, CR30) specified by SFR pointer
3 (this operation is to automatically update an identification threshold value when the tape speed fluctuates).
Data storage buffer (memory)
Data n
Data n
-
1
Data 2
Data 1
SFR
Internal bus
Data storage buffer (memory)
Data n
Data n
-
1
Data 2
Data 1
SFR
Internal bus
Coefficient (memory)
CPT30
TM3
CR30
Multiplier
Buffer area (memory)
Compare area (memory)
Coincidence
CTL F/F
(bit 7 of TMC3)
Vector interrupt
相關(guān)PDF資料
PDF描述
UPD784916A 16-BIT SINGLE-CHIP MICROCONTROLLERS
UPD784916AGF 16-BIT SINGLE-CHIP MICROCONTROLLERS
UPD784915B 16-BIT SINGLE-CHIP MICROCONTROLLERS
UPD784915BGF 16-BIT SINGLE-CHIP MICROCONTROLLERS
UPD784916B 16-BIT SINGLE-CHIP MICROCONTROLLERS
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