参数资料
型号: M30600M8-XXXGP
元件分类: 微控制器/微处理器
英文描述: 16-BIT, MROM, MICROCONTROLLER, PQFP100
封装: 14 X 14 MM, 0.50 MM PITCH, PLASTIC, LQFP-100
文件页数: 59/139页
文件大小: 1782K
代理商: M30600M8-XXXGP
Mitsubishi microcomputers
M16C / 60 Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
26
(4) ALE signal
The ALE signal latches the address when accessing the multiplex bus space. Latch the address when the
ALE signal falls.
_____
________
Figure 1.18. Example of RD signal extended by RDY signal
(5) Ready signal
The ready signal facilitates access of external devices that require a long time for access. As shown in
________
Figure 1.18, inputting “L” to the RDY pin at the falling edge of BCLK causes the microcomputer to enter
________
the ready state. Inputting “H” to the RDY pin at the falling edge of BCLK cancels the ready state. Table 1.9
_____
shows the microcomputer status in the ready state. Figure 1.18 shows an example of the RD signal being
________
extended using the RDY signal.
Ready is valid when accessing the external area during the bus cycle in which the software wait is applied.
BCLK
RD
CSi
(i = 0 to 3)
RDY
:
Wait using ready function
tsu(RDY — BCLK)
:
Wait using software
Figure 1.17. ALE signal and address/data bus
When BYTE pin = “H”
When BYTE pin = “L”
Address
Data (Note 1)
D0/A0 to D7/A7
Address (Note 2)
A8 to A19
D0/A1 to D7/A8
Address
Data (Note 1)
A9 to A19
Address
A0
Address
Note 1: Floating when reading.
Note 2: When multiplexed bus for the entire space is selected, these are I/O ports.
ALE
Item
Status
Oscillation
On
___
_____
R/W signal, address bus, data bus, CS
Maintain status when ready signal received
__________
ALE signal, HLDA, programmable I/O ports
Internal peripheral circuits
On
Note: The ready signal cannot be received immediately prior to a software wait.
Table 1.9. Microcomputer status in ready state (Note)
Bus Control
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