Fujitsu MB91150 Series Hardware Manual page 29

Table 1.5-1 Functions of the MB91150 pins (Continued)
Pin No. Pin name
36 P60/A16
37 P61/A17
38 P62/A18
39 P63/A19
40 P64/A20
41 P65/A21
42 P66/A22
43 P67/A23
45 P80/RDY
46 P81/BGRNT
47 P82/BRQ
48 P83/RD
49 P84/WR0
50 P85/WR1
51 P86/CLK
52 MD2
53 MD1
54 MD0
55 RST
Circuit type
O External address bus bits 16 to 23
Can be used as a port when the address bus is not
used.
C External RDY input
Effective when external RDYU input is enabled.
"0" is input if the bus cycle in progress fails to be
complete.
Can be used as a port when external RDY input is not
used.
F External bus open acceptance output
Effective when external bus open acceptance output is
enabled.
Outputs L when the external bus is opened.
Can be used as a port when external bus open
acceptance output is disabled.
C External bus open request input
Effective when external bus open request input is
enabled.
Input "1" to open the external bus.
Can be used as a port when external bus open
request input is disabled.
F External bus read strobe output
Effective when external bus read strobe output is
enabled.
Can be used as a port when external bus read strobe
output is disabled.
F External bus write strobe output
Effective in external bus mode.
Can be used as a port in single chip mode.
F External bus write strobe output
Effective when MB91150 is in external bus mode and
bus width is 16 bits.
Can be used as a port when MB91150 is in single chip
mode or 8-bit external bus mode.
F System clock output
Outputs a clock signal that is equal to the operating
frequency of the external bus. Can be used as a port
when the system clock is not used.
G Connect these pins directly to V
These pins set the basic MCU operation mode.
Mode pins
B External reset input
CHAPTER 1 OVERVIEW OF THE MB91150
Function description
or V
CC
.
SS
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