Mitsubishi Electric M32R Series User Manual page 31

1
Table 1.3.1 Description of the 32170 Pin Function (2/6)
Type Pin Name Signal Name
Data DB0-DB15 Data bus
bus
___
Bus CS0,
___
control CS1
__
RD
___ ___
BHW/BHE Byte high
___ ___
BLW/BLE Byte low
____
WAIT
____
HREQ
Multi-
____
HACK
junction
timer
TIN 0–TIN 33 Timer input
TO 0– TO 44 Timer output
TCLK 0– TCLK 3 Timer clock
A-D AVCC0,
converter AVCC1
AVSS0,
AVSS1
AD0IN0
– AD0IN15
AD1IN0
– AD1IN15
Input/Output Function
Input/Output These pins comprise 16-bit data bus to connect external devices. In write
Chip select Output
Read Output
Output
write/enable
Output
write/enable
Wait Input
Hold request Input
Hold Output
acknowledge
Input
Output
Input
Analog power supply —
Analog ground —
—
Analog input Input
1-13
cycles, the valid byte positions to be written on the 16-bit data bus are
output as BHW/BHE and BLW/BLE. In read cycles, data is always read
from the 16-bit data bus. However, when transferring to the internal circuit
of the M32R, only data at the valid byte positions are transferred.
These pins comprise external device chip select signal. For
areas for which a chip select signal is output, refer to
Chapter 3, "Address Space."
This signal is output when reading an external device.
Indicates the byte position to which valid data is transferred
when writing to an external device. BHW/BHE corresponds
to the upper address (D0-D7 is valid); BLW/BLE
corresponds to the lower address (D8-D15 is valid).
When the M32R accesses an external device, a low on this
____
WAIT input extends the wait cycle.
This pin is used by an external device to request control of
the external bus. A low on this HREQ input causes the
M32R to enter a hold state.
This signal is used to notify that the M32R has entered a
hold state and relinquished control of the external bus.
Input pins for multijunction timer.
Output pins for the multijunction timer.
Clock input pins for the multijunction timer.
AVCC0 is the power supply for the A-D0 converter. AVCC1
is the power supply for the A-D1 converter. Connect AVCC0
and 1 to the power supply rail.
AVSS0 is analog ground for the A-D0 converter. AVSS1 is
analog ground for the A-D1 converter. Connect AVSS0 and
1 to the ground.
16-channel analog input pins for the A-D0 converter.
16-channel analog input pins for the A-D1 converter.
OVERVIEW
1.3 Pin Function
___ ___
___ ___
____
Ver.0.10