參數(shù)資料
型號(hào)： ST90T158M9LVQ1
廠商： STMICROELECTRONICS
元件分類(lèi)： 微控制器/微處理器
英文描述： 16-BIT, OTPROM, 14 MHz, MICROCONTROLLER, PQFP80
封裝： PLASTIC, QFP-80
文件頁(yè)數(shù)： 110/190頁(yè)
文件大?。?/td> 1152K
代理商： ST90T158M9LVQ1
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ST90158 - DEVICE ARCHITECTURE
SYSTEM REGISTERS (Cont’d)
2.3.4 Paged Registers
Up to 64 pages, each containing 16 registers, may
be mapped to Group F. These paged registers
hold data and control information relating to the
on-chip peripherals, each peripheral always being
associated with the same pages and registers to
ensure code compatibility between ST9+ devices.
The number of these registers depends on the pe-
ripherals present in the specific ST9 device. In oth-
er words, pages only exist if the relevant peripher-
al is present.
The paged registers are addressed using the nor-
mal register addressing modes, in conjunction with
the Page Pointer register, R234, which is one of
the System registers. This register selects the
page to be mapped to Group F and, once set,
does not need to be changed if two or more regis-
ters on the same page are to be addressed in suc-
cession.
Thus the instructions:
spp #5
ld R242, r4
will load the contents of working register r4 into the
third register of page 5 (R242).
Warning:
During an interrupt, the PPR register is
not saved automatically in the stack. If needed, it
should be saved/restored by the user within the in-
terrupt routine.
PAGE POINTER REGISTER (PPR)
R234 - Read/Write
Register Group: E (System)
Reset value: xxxx xx00 (xxh)
Bit 7:2 = PP[5:0]:
Page Pointer.
These bits contain the number (in the range 0 to
63) of the page specified in the spp instruction.
Once the page pointer has been set, there is no
need to refresh it unless a different page is re-
quired.
Bit 1:0: Reserved. Forced by hardware to 0.
2.3.5 Mode Register
The Mode Register allows control of the following
operating parameters:
– Selection of internal or external System and User
Stack areas,
– Management of the clock frequency,
– Enabling of Bus request and Wait signals when
interfacing to external memory.
MODE REGISTER (MODER)
R235 - Read/Write
Register Group: E (System)
Reset value: 1110 0000 (E0h)
Bit 7 = SSP:
System Stack Pointer.
This bit selects an internal or external System
Stack area.
0: External system stack area, in memory space.
1: Internal system stack area, in the Register File
(reset state).
Bit 6 = USP:
User Stack Pointer.
This bit selects an internal or external User Stack
area.
0: External user stack area, in memory space.
1: Internal user stack area, in the Register File (re-
set state).
Bit 5 = DIV2:
OSCIN Clock Divided by 2.
This bit controls the divide-by-2 circuit operating
on OSCIN.
0: Clock divided by 1
1: Clock divided by 2
Bit 4:2 = PRS[2:0]:
CPUCLK Prescaler.
These bits load the prescaler division factor for the
internal clock (INTCLK). The prescaler factor se-
lects the internal clock frequency, which can be di-
vided by a factor from 1 to 8. Refer to the Reset
and Clock Control chapter for further information.
Bit 1 = BRQEN:
Bus Request Enable.
0: External Memory Bus Request disabled
1: External Memory Bus Request enabled on the
BREQ pin (where available).
Bit 0 = HIMP:
High Impedance Enable.
When any of Ports 0, 1, 2 or 6 depending on de-
vice configuration, are programmed as Address
and Data lines to interface external Memory, these
lines and the Memory interface control lines (AS,
70
PP5
PP4
PP3
PP2
PP1
PP0
0
70
SSP
USP
DIV2
PRS2
PRS1
PRS0 BRQEN HIMP
9
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ST90R158T1 16-BIT, 14 MHz, MICROCONTROLLER, PQFP80
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ST90T158M9LVQ6 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:8-Bit Microcontroller
ST90T158M9LVT1 制造商:STMICROELECTRONICS 制造商全稱(chēng):STMicroelectronics 功能描述:8/16-BIT MCU FAMILY WITH UP TO 64K ROM/OTP/EPROM AND UP TO 2K RAM
ST90T158M9LVT6 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:8/16-BIT MICROCONTROLLER (MCU) WITH 16 TO 64K ROM. OTP OR EPROM. 512 TO 2K RAM - ST9 + FAMILY
ST90T158M9Q6 功能描述:8位微控制器 -MCU Flash 64K SPI/2xSCI 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
ST90T158M9T6 功能描述:8位微控制器 -MCU Flash 64K SPI/2xSCI 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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