M16CSLASH62P datasheet(37/349 Pages) MITSUBISHI

37 / 349 page

Bus

Mitsubishi microcomputers

M16C / 62P Group

SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

Under

development

Preliminary Specifications Rev.1.0

Specifications in this manual are tentative and subject to change.

_____

______

________

Table 1.7.3. Operation of RD, WR and BHE Signals

Status of external data bus

BHE

LHL

HLH

Write 1 byte of data to an odd address

Read 1 byte of data from an odd address

Write 1 byte of data to an even address

Read 1 byte of data from an even address

Data bus width

LHL

H or L

8-bit (BYTE pin

input = “H”)

Write data to both even and odd addresses

Read data from both even and odd addresses

Write 1 byte of data

Read 1 byte of data

16-bit

(BYTE pin input

= “L”)

(Note)

Note : Do not use.

Status of external data bus

Read data

Write 1 byte of data to an even address

Write 1 byte of data to an odd address

Write data to both even and odd addresses

WRH

WRL

Data bus width

16-bit

( BYTE pin input

= “L”)

_____

________

_________

Table 1.7.2. Operation of RD, WRL and WRH Signals

(4) Read and Write Signals

_____

When the data bus is 16 bits wide, the read and write signals can be chosen to be a combination of RD,

________

______

_____

________

BHE and WR or a combination of RD, WRL and WRH by using the PM02 bit in the PM0 register. When

_____

______

________

the data bus is 8 bits wide, use a combination of RD, WR and BHE.

_____

________

_________

Table 1.7.2 shows the operation of RD, WRL, and WRH signals. Table 1.7.3 shows the operation of

_____

______

________

operation of RD, WR, and BHE signals.

(5) ALE Signal

The ALE signal latches the address when accessing the multiplex bus space. Latch the address when the

ALE signal falls.

When BYTE pin input = “H”

When BYTE pin input = “L”

ALE

Address

Data

Address (Note)

A0/D0 to A7/D7

A8 to A19

ALE

Address

Data

Address

A1/D0 to A8/D7

A9 to A19

Address

Note : If the entire CS space is assigned a multiplexed bus, these pins function as I/O ports.

Figure 1.7.3. ALE Signal, Address Bus, Data Bus

M16C/62P Datasheet(PDF) 37 Page - Mitsubishi Electric Semiconductor

M16C/62P Datasheet(HTML) 37 Page - Mitsubishi Electric Semiconductor

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL