数据搜索系统,热门电子元器件搜索 |
|
TS80C31X2-LCA 数据表(PDF) 9 Page - ATMEL Corporation |
|
TS80C31X2-LCA 数据表(HTML) 9 Page - ATMEL Corporation |
9 / 42 page 9 4428E–8051–02/08 AT/TS80C31X2 7. Dual Data Pointer Register Ddptr The additional data pointer can be used to speed up code execution and reduce code size in a number of ways. The dual DPTR structure is a way by which the chip will specify the address of an external data memory location. There are two 16-bit DPTR registers that address the external memory, and a single bit called DPS = AUXR1/bit0 (See Table 5.) that allows the program code to switch between them (Refer to Figure 7-1). Figure 7-1. Use of Dual Pointer Reset Value = XXXX XXX0 Not bit addressable Table 7-1. AUXR1: Auxiliary Register 1 7 6 5 4 3 2 1 0 - -3 - - - - - DPS Bit Number Bit Mnemonic Description 7 - Reserved The value read from this bit is indeterminate. Do not set this bit. 6 - Reserved The value read from this bit is indeterminate. Do not set this bit. 5 - Reserved The value read from this bit is indeterminate. Do not set this bit. 4 - Reserved The value read from this bit is indeterminate. Do not set this bit. 3 - Reserved The value read from this bit is indeterminate. Do not set this bit. 2 - Reserved The value read from this bit is indeterminate. Do not set this bit. 1 - Reserved The value read from this bit is indeterminate. Do not set this bit. 0 DPS Data Pointer Selection Clear to select DPTR0. Set to select DPTR1. External Data Memory AUXR1(A2H) DPS DPH(83H) DPL(82H) 0 7 DPTR0 DPTR1 |
类似零件编号 - TS80C31X2-LCA |
|
类似说明 - TS80C31X2-LCA |
|
|
链接网址 |
隐私政策 |
ALLDATASHEETCN.COM |
ALLDATASHEET是否为您带来帮助? [ DONATE ] |
关于 Alldatasheet | 广告服务 | 联系我们 | 隐私政策 | 链接交换 | 制造商名单 All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |