參數(shù)資料
型號(hào)： MC68L11FC0PU4
廠商： MOTOROLA INC
元件分類(lèi)： 微控制器/微處理器
英文描述： Technical Summary 8-Bit Microcontroller
中文描述： 8-BIT, MICROCONTROLLER, PQFP80
封裝： TQFP-80
文件頁(yè)數(shù)： 14/74頁(yè)
文件大?。?/td> 513K
代理商： MC68L11FC0PU4
MC68HC11F1/FC0
MOTOROLA
MC68HC11FTS/D
21
RBOOT — Read Bootstrap ROM
RBOOT is valid only when SMOD is set to one (special bootstrap or special test mode). RBOOT can
only be written in special modes but can be read anytime.
0 = Boot loader ROM disabled and not in memory map
1 = Boot loader ROM enabled and in memory map at $BF00–$BFFF
SMOD and MDA — Special Mode Select and Mode Select A
The initial value of SMOD is the
inverse of the logic level present on the MODB pin at the rising edge
of reset. The initial value of MDA
equals the logic level present on the MODA pin at the rising edge of
reset. These two bits can be read at any time. They can be written at any time in special modes. Neither
bit can be written in normal modes. SMOD cannot be set once it has been cleared. Refer to Table 8.
IRV — Internal Read Visibility
This bit can be read at any time. It can be written at any time in special modes, but only once in normal
modes. In single-chip and bootstrap modes, IRV has no meaning or effect.
0 = Internal reads not visible
1 = Data from internal reads is driven on the external data bus
The INIT register can be written only once in first 64 cycles out of reset in normal modes, or at any time
in special modes.
NOTE
The register diagram above applies to the MC68HC11FC0 only. A diagram and bit
descriptions of the INIT register in the MC68HC11F1 are provided elsewhere in
this section.
RAM[5:0] — Internal RAM Map Position
These bits determine the upper six bits of the RAM address and allow mapping of the RAM to any one-
Kbyte boundary.
REG[1:0] — Register Block Map Position
These bits determine the location of the register block, as shown in Table 9.
Table 8 Hardware Mode Select Summary
Input Pins
Mode Description
Control Bits in HPRIO (Latched at Reset)
MODB
MODA
RBOOT
SMOD
MDA
1
0
Single Chip
0
1
Expanded
0
1
0
Special Bootstrap
1
0
1
Special Test
0
1
INIT — RAM and I/O Mapping (MC68HC11FC0 only)
$x03D
Bit 7
6
5
4
3
2
1
Bit 0
RAM5
RAM4
RAM3
RAM2
RAM1
RAM0
REG1
REG0
RESET:
0
1
Table 9 Register Block Location
REG[1:0]
Register Block Address
0 0
$0000 – $005F
0 1
$1000 – $105F
1 0
$2000 – $205F
1 1
$3000 – $305F
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