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STR720 数据表(PDF) 124 Page - STMicroelectronics

部件名 STR720
功能描述  ARM720T 16/32-BIT MCU WITH 16K RAM, USB, CAN, 3 TIMERS, ADC, 6 COMMUNICATIONS INTERFACES
PDF  401 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

STR720 数据表(HTML) 124 Page - STMicroelectronics

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STR720 - EXTERNAL MEMORY INTERFACE (EMI)
124/401
Bank 1 Base Address Register (BBASE1)
Address Offset: 10h
Reset value: 0000h
Note
According to I/O configuration, memory bank 1 could not be accessible. In that case
this register must be considered reserved and it must be always written to 0000h.
The Bank 1 Base Address Register (BBASE1) is a 16 bit read/write register. It defines the
location of the Bank 1 memory region accordingly to the expression: Start Address =
0b_BBASE1[11:0] | 000_0000_0000, where bits 22 down to 11 of the address are determined
by the content of the BBASE1 register and remaining bits 10 down to 0 are set to zero. This
allows the configuration of the bank start address with a granularity of 211 (2k) bytes in the
total EMI addressable space of 223 (8M) bytes.
Bit 15:12 Reserved. These bits must be always written to ‘0’.
Bit 11:0
BBASE1[11:0]. Bank 1 Start Address Register.
The 12 bits of the register are the 12 MSB bits of the region start address.
11.4.1
Register map
In the Table 34 an overview of the EMI registers is reported.
Refer to Table 21 on page 50 for the base address.
15
14
13
12
11
10
9
8
765432
1
0
Reserved
B_BASE1[11:0]
-rw
Table 34. EMI Register Map
Addr.
Offset
Register
Name
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
0
BCON0
Res.
B_LENGTH[6:0]
EREN
ISYN0
BE
C_LENGTH[2:0]
Res.
Res1
4
BCON1
Res.
B_LENGTH[6:0]
EREN
ISYN1
BE
C_LENGTH[2:0]
Res.
Res1
8
-
Reserved (always write 0001h)
C
-
Reserved (always write 0001h)
10
BBASE1
Reserved
B_BASE1[11:0]
1



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