Interrupt function: 10 internal interrupts and 4 external
interrupts
Micro Direct Memory Access (
µ
DMA) function (11 channels)
Watchdog timer
Standby function (4 HALT modes)
The information contained here is subject to change without notice.
The information contained herein is presented only as guide for the applications of our products. No responsibility is assumed by TOSHIBA for any infringements of patents or other rights of the third parties
which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of TOSHIBA or others. These TOSHIBA products are intended for usage in general electronic
equipments (office equipment, communication equipment, measuring equipment, domestic electrification, etc.) Please make sure that you consult with us before you use these TOSHIBA products in equip-
ments which require high quality and/or reliability, and in equipments which could have major impact to the welfare of human life (atomic energy control, spaceship, traffic signal, combustion control, all types
of safety devices, etc.). TOSHIBA cannot accept liability to any damage which may occur in case these TOSHIBA products were used in the mentioned equipments without prior consultation with TOSHIBA.
TOSHIBA CORPORATION
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TMP90C441
Figure 1. TMP90C441 Block Diagram
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TMP90C441
2. Pin Assignment and Functions
The assignment of input/output pins, their names and functions
are described below.
2.1 Pin Assignment
Figure 2.1 (1) shows pin assignment of the TMP90C441N.
Figure 2.1 (1). Pin Assignment
(Shrink Dual Inline Package)
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TMP90C441
Figure 2.1 (2) shows pin assignment of theTMP90C441F.
Figure 1. 1 (2). Pin Assignment (Flat Package)
2.2 Pin Names and Functions
The names of input/output pins and their functions are summarized in Table 2.2.
Table 2.2 Pin Names and Functions (1/2)
Pin Name
D0 ~ D7
A0 ~ A7
A8 ~ A15
P30
/RxD
P31
/RxD
P32
/TxD
/RTS
/SCLK
P33
/TxD
P34
/CTS
RD
WR
No. of pins
8
8
8
1
I/O 3 states
3 states
Output
Output
Input
Function
Data bus: Also functions as 8-bit bidirectional data bus for external memory
Address bus: The lower 8 bits address bus for external memory
Address bus: The upper 8 bits address bus for external memory
Port 30: 1-bit input port
Receiver Serial Data
Port 31: 1-bit input port
Receiver Serial Data
Port 32: 1-bit input port
1
Input
1
Output
Transmitter Serial Data
Request to send Serial Data
Serial clock output
1
Output
Port 33: 1-bit output port
Transmitter Serial Data
Port 34: 1-bit input port
Clear to send Serial data
Read: Generates strobe signal for reading external memory
Write: Generates strobe signal for writing into external memory
1
1
1
Input
Output
Output
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TMP90C441
Table 2.2 Pin Names and Functions (2/2)
Pin Name
P37
/WAIT
P40 ~ P43
/A16 ~ A19
P50 ~ P55
/AN0 ~ AN5
VREF
AGND
P60 ~ P63
/M00 ~ M03
/TO1
P70 ~ P73
/M10 ~ M13
/TO3
No. of Pins
1
I/O 3 states
Input
Port 37: 1-bit input port
Function
Wait: Input pin for connecting slow speed memory or peripheral LSI
Port 4: 4-bit output port that allows selection of Port/Address Bus on bit basis
4
Output
Address bus: Also functions as address bus for external memory
(4 bits of bank address)
Port 5: 6-bit input port
Analog input: 6 analog input to A/D converter
Input of reference voltage to A/D converter
Ground pin for A/D converter
Port 6: 4-bit I/O port that allows I/O selection on bit basis
Stepping motor control port 0
Timer output 1: Output of Timer 0 or 1
Port 7: 4-bit I/O port that allows I/O selection on bit basis
Stepping motor control port 1
Timer output 3: Output of timer 2 or 3
Port 80: 1-bit input port
6
1
1
Input
–
–
I/O
4
Output
Output
I/O
4
Output
Output
P80
/INTO
1
Input
Interrupt request pin 0: Interrupt request pin (Level/rising edge is
programmable)
Port 81: 1-bit input port
P81
/INT1
/TI4
Interrupt request pin 1: Interrupt request pin (Rising/falling edge is
programmable)
1
Input
Timer input 4: Counter/capture trigger signal for Timer 4
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