16-Bit Multiplexed Bus Interface Mode - Fujitsu MB88121 Application Note

2.5.2 16-bit multiplexed bus interface mode

External bus interface: CC pins in connection with MCU pins
CC pin Nr Name
53 AD10
54 AD9
55 AD8
56 AD7
57 AD6
58 AD5
59 AD4
60 AD3
61 AD2
62 AD1
63 AD0
46 D15
47 D14
50 D13
51 D12
52 D11
15 BCLK
CS
19
20 RD
WR
21
AS
22
27 RDY
Table 2-7: 16-bit multiplexed bus interface pin assignment
MCU-AN-300016-E-V10
Interfacing MB91460 TO MB88121
Chapter 2 Hardware
Function
Address/data bus
MCU CC
Data bus
MCU CC
Bus clock
Chip select
Read enable
MCU=>CC
Write enable
Address strobe
Ready signal CC=>MCU
- 12 -
MCU pin Nr
12
11
10
9
8
7
6
5
4
3
2
17
16
15
14
13
65 P10_4/MCLKO
59
P09_3/CSX3
50
64
62
55
© Fujitsu Microelectronics Europe GmbH
Name
P00_2/D26
P00_1/D25
P00_0/D24
P01_7/D23
P01_6/D22
P01_5/D21
P01_4/D20
P01_3/D19
P01_2/D18
P01_1/D17
P01_0/D16
P00_7/D31
P00_6/D30
P00_5/D29
P00_4/D28
P00_3/D27
3
P08_4/RDX
P10_3/WEX
P10_1/ASX
P08_7/RDY