參數(shù)資料
型號(hào)： ST72F324B
廠商： 意法半導(dǎo)體
英文描述： 5V Range 8-Bit MCU With 8 TO 32K FLASH/ROM, 10-Bit ADC, 4 Timers, SPI, SCI Interface(具有ICP,IAP,Nested Interrupt,TLI,ROP的8位MCU)
中文描述： 5V范圍內(nèi)的8位8到32K閃存/ ROM，10位ADC，4個(gè)計(jì)時(shí)器，SPI和SCI接口（具有比較方案，國(guó)際檢察官聯(lián)合會(huì)，嵌套中斷，中華語文研習(xí)所，人事登記的8位微控制器）
文件頁數(shù)： 34/167頁
文件大?。?/td> 1641K
代理商： ST72F324B
ST72324B
34/167
1
INTERRUPTS
(Cont’d)
7.5 INTERRUPT REGISTER DESCRIPTION
CPU CC REGISTER INTERRUPT BITS
Read/Write
Reset Value: 111x 1010 (xAh)
Bit 5, 3 =
I1, I0
Software Interrupt Priority
These two bits indicate the current interrupt soft-
ware priority.
These two bits are set/cleared by hardware when
entering in interrupt. The loaded value is given by
the corresponding bits in the interrupt software pri-
ority registers (ISPRx).
They can be also set/cleared by software with the
RIM, SIM, HALT, WFI, IRET and PUSH/POP in-
structions (see “Interrupt Dedicated Instruction
Set” table).
*Note
: TRAP and RESET events can interrupt a
level 3 program.
INTERRUPT SOFTWARE PRIORITY REGIS-
TERS (ISPRX)
Read/Write (bit 7:4 of
ISPR3
are read only)
Reset Value: 1111 1111 (FFh)
7
These four registers contain the interrupt software
priority of each interrupt vector.
– Each interrupt vector (except RESET and TRAP)
has corresponding bits in these registers where
its own software priority is stored. This corre-
spondance is shown in the following table.
– Each I1_x and I0_x bit value in the ISPRx regis-
ters has the same meaning as the I1 and I0 bits
in the CC register.
– Level 0 can not be written (I1_x=1, I0_x=0). In
this case, the previously stored value is kept. (ex-
ample: previous=CFh, write=64h, result=44h)
The RESET, and TRAP vectors have no software
priorities. When one is serviced, the I1 and I0 bits
of the CC register are both set.
Caution
: If the I1_x and I0_x bits are modified
while the interrupt x is executed the following be-
haviour has to be considered: If the interrupt x is
still pending (new interrupt or flag not cleared) and
the new software priority is higher than the previ-
ous one, the interrupt x is re-entered. Otherwise,
the software priority stays unchanged up to the
next interrupt request (after the IRET of the inter-
rupt x).
7
0
1
1
I1
H
I0
N
Z
C
Interrupt Software Priority
Level 0 (main)
Level 1
Level 2
Level 3 (= interrupt disable*)
Level
Low
I1
1
0
0
1
I0
0
1
0
1
High
0
ISPR0
I1_3
I0_3
I1_2
I0_2
I1_1
I0_1
I1_0
I0_0
ISPR1
I1_7
I0_7
I1_6
I0_6
I1_5
I0_5
I1_4
I0_4
ISPR2
I1_11 I0_11 I1_10 I0_10 I1_9
I0_9
I1_8
I0_8
ISPR3
1
1
1
1
I1_13 I0_13 I1_12 I0_12
Vector address
ISPRx bits
FFFBh-FFFAh
FFF9h-FFF8h
...
FFE1h-FFE0h
I1_0 and I0_0 bits*
I1_1 and I0_1 bits
...
I1_13 and I0_13 bits
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ST72F324BJ2B6 功能描述:8位微控制器 -MCU ST72324B 5V RANGE 8B MCU RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
ST72F324BJ2T6 功能描述:8位微控制器 -MCU 8-BIT MCU W/ 8-32K Flash/ROM ADC RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
ST72F324BJ4B5 功能描述:8位微控制器 -MCU ST72324B 5V RANGE 8B MCU RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
ST72F324BJ4B6 功能描述:8位微控制器 -MCU 5V RANGE 8B MCU RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
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