參數(shù)資料
型號: TSC87251G2D-L16CE
廠商: Atmel
文件頁數(shù): 4/77頁
文件大小: 0K
描述: IC MCU 8BIT 32K OTP 16MHZ 44VQFP
標準包裝: 160
系列: 8x251
核心處理器: C251
芯體尺寸: 8/16-位
速度: 16MHz
連通性: EBI/EMI,I²C,Microwire,SPI,UART/USART
外圍設(shè)備: POR,PWM,WDT
輸入/輸出數(shù): 32
程序存儲器容量: 32KB(32K x 8)
程序存儲器類型: OTP
RAM 容量: 1K x 8
電壓 - 電源 (Vcc/Vdd): 2.7 V ~ 5.5 V
振蕩器型: 內(nèi)部
工作溫度: 0°C ~ 70°C
封裝/外殼: 44-LQFP
包裝: 托盤
12
AT/TSC8x251G2D
4135F–8051–11/06
compatibility with the C51 Architecture). When PC increments beyond the end of seg-
ment FE:, it continues at the reset address FF:0000h (linearity). When PC increments
beyond the end of segment 01:, it loops to the beginning of segment 00: (this prevents
from its going into the reserved area).
Data Memory
The TSC80251G2D derivatives implement 1 Kbyte of on-chip data RAM. Figure 5
shows the split of the internal and external data memory spaces. This memory is
mapped in the data space just over the 32 bytes of registers area (see TSC80251 Pro-
grammers’ Guide). Hence, the part of the on-chip RAM located from 20h to FFh is bit
addressable. This on-chip RAM is not accessible through the program/code memory
space.
F o r f a st er com put atio n w i th t he on- chip R O M / EPR O M cod e o f the
TSC83251G2D/TSC87251G2D, its upper 16 KB are also mapped in the upper part of
the region 00: if the On-Chip Code Memory Map configuration bit is cleared (EMAP# bit
in UCONFIG1 byte, see Figure ). However, if EA# is tied to a low level, the
TSC80251G2D derivative is running as a ROMless product and the code is actually
fetched in the corresponding external memory (i.e. the upper 16 KB of the lower 32 KB
of the segment FF:). If EMAP# bit is set, the on-chip ROM is not accessible through the
region 00:.
All the accesses to the portion of the data space with no on-chip memory mapped onto
are redirected to the external memory.
Figure 5.
Data Memory Mapping
On-chip ROM/EPROM
Code Memory
Data Segments
Data External
Memory Space
16 KB
EA# = 0
EA# = 1
32 KB
Reserved
64 KB
47 KB
FF:FFFFh
FF:8000h
FF:7FFFh
FF:0000h
FE:FFFFh
FE:0000h
FD:FFFFh
01:FFFFh
01:0000h
02:0000h
00:FFFFh
00:0420h
32 bytes reg.
RAM Data
1 Kbyte
16 KB
00:C000h
00:BFFFh
EMAP# = 1
EMAP# = 0
16 KB
64 KB
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