收藏本站
参数资料
型号： S1D13706F00A
元件分类： 显示控制器
英文描述： 320 X 240 PIXELS CRT OR FLAT PNL GRPH DSPL CTLR, PQFP100
封装： TQFP-100
文件页数： 140/171页
文件大小： 4940K
代理商： S1D13706F00A
APPENDIX
7751 Group User’s Manual
20–73
Appendix 9. Q & A
Interrupt
There is a routine where a certain interrupt request should not be accepted (with enabled acceptance
of all other interrupt requests). Accordingly, the program set the interrupt priority level select bits of
the interrupt to be not accepted to “0002” in order to disable it before executing the routine. However,
the interrupt request of that interrupt has been accepted immediately after the priority level had been
changed. Why did this occur and what can I do about it?
When changing the interrupt priority level, the microcomputer can behave “as if the interrupt request
is accepted immediately after it is disabled ” if the next instruction (the LDA instruction in the above
case) is already stored in the BIU’s instruction queue buffer and conditions to accept the interrupt
request which should not be accepted are met immediately before executing the instruction which is
in that buffer.
When writing to a memory or an I/O, the CPU passes the address and data to the BIU. Then, the
CPU executes the next instruction in the instruction queue buffer while the BIU is writing data into
the actual address. Detection of interrupt priority level is performed at the beginning of each instruc-
tion.
In the above case, in the interrupt priority detection which is performed simultaneously with the
execution of the next instruction, the interrupt priority level before changing it is detected and the
interrupt request is accepted. It is because the CPU executes the next instruction before the BIU
finishes changing the interrupt priority levels.
Q
A
(1/2)
Interrupt request is
accepted
in
this
interval
:
LDM #00H, XXXIC ; Writes “0002” to interrupt priority level select bits.
; Clears interrupt request bit to “0.”
LDA A,DATA
; Instruction at the beginning of the routine that
should not accept one certain interrupt request.
:;
Previous instruction
executed
(Instruction prefetch)
CPU operation
BIU operation
Interrupt priority detection time
Sequence of execution
Interrupt priority level select bits set
Change of interrupt priority levels
completed
Interrupt request accepted
Interrupt request generated
LDM instruction
executed
LDA instruction
executed
相关PDF资料
PDF描述
S1D13806F00A CRT OR FLAT PNL GRPH DSPL CTLR, PQFP144
S1D13A05B00B 320 X 320 PIXELS CRT OR FLAT PNL GRPH DSPL CTLR, PBGA121
S1D13A05F00A100 320 X 320 PIXELS CRT OR FLAT PNL GRPH DSPL CTLR, PBGA121
S1R72005F00A300 UNIVERSAL SERIAL BUS CONTROLLER, PQFP64
S1R72105F00A000 SCSI BUS CONTROLLER, PQFP100
相关代理商/技术参数
参数描述
S1D13706F00A200 功能描述:LCD 驱动器 (QVGA) 320x240 LCD Controller @ 8bpp RoHS:否 制造商:Maxim Integrated 数位数量:4.5 片段数量:30 最大时钟频率:19 KHz 工作电源电压:3 V to 3.6 V 最大工作温度:+ 85 C 最小工作温度:- 20 C 封装 / 箱体:PDIP-40 封装:Tube
S1D13715B00B200 功能描述:LCD 驱动器 LCD Controller RoHS:否 制造商:Maxim Integrated 数位数量:4.5 片段数量:30 最大时钟频率:19 KHz 工作电源电压:3 V to 3.6 V 最大工作温度:+ 85 C 最小工作温度:- 20 C 封装 / 箱体:PDIP-40 封装:Tube
S1D13715B00C10B 功能描述:LCD 驱动器 320KB, megpixel I/F RoHS:否 制造商:Maxim Integrated 数位数量:4.5 片段数量:30 最大时钟频率:19 KHz 工作电源电压:3 V to 3.6 V 最大工作温度:+ 85 C 最小工作温度:- 20 C 封装 / 箱体:PDIP-40 封装:Tube
S1D13717B00B100 功能描述:LCD 驱动器 LCD Controller RoHS:否 制造商:Maxim Integrated 数位数量:4.5 片段数量:30 最大时钟频率:19 KHz 工作电源电压:3 V to 3.6 V 最大工作温度:+ 85 C 最小工作温度:- 20 C 封装 / 箱体:PDIP-40 封装:Tube
S1D13717B00C100 功能描述:LCD 驱动器 LCD Controller RoHS:否 制造商:Maxim Integrated 数位数量:4.5 片段数量:30 最大时钟频率:19 KHz 工作电源电压:3 V to 3.6 V 最大工作温度:+ 85 C 最小工作温度:- 20 C 封装 / 箱体:PDIP-40 封装:Tube
发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

*型号 *数量 厂商 批号 封装
添加更多采购

我的联系方式

*
*
*