TMP86C909XB Toshiba, TMP86C909XB Datasheet - Page 60
TMP86C909XB
Manufacturer Part Number
TMP86C909XB
Description
EMULATION CHIP FOR TMP86F SDIP
Manufacturer
Toshiba
Datasheet
1.TMP86C909XB.pdf
(201 pages)
Specifications of TMP86C909XB
Accessory Type
Adapter
For Use With/related Products
TMP86F SDIP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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5. I/O Ports
input data should be externally held until the input data is read from outside or reading should be performed several
timer before processing. Figure 5-1 shows input/output timing examples.
timing cannot be recognized from outside, so that transient input such as chattering must be processed by the pro-
gram.
port.
The TMP86F409NG have 4 parallel input/output ports as follows.
Each output port contains a latch, which holds the output data. All input ports do not have latches, so the external
External data is read from an I/O port in the S1 state of the read cycle during execution of the read instruction. This
Output data changes in the S2 state of the write cycle during execution of the instruction which writes to an I/O
Note: The positions of the read and write cycles may vary, depending on the instruction.
Port P0
Port P1
Port P2
Port P3
Data input
Output strobe
Data Output
execution cycle
execution cycle
nput strobe
nstruction
nstruction
Primary Function
8-bit I/O port
7-bit I/O port
3-bit I/O port
8-bit I/O port
Figure 5-1 Input/Output Timing (Example)
S0
S0
External interrupt input, Timer/Counter input/output, serial interface input/output,
serial PROM mode control input/output.
External interrupt input and divider output
External interrupt input and STOP mode release signal input
Analog input, STOP mode release signal input and Timer/Counter input/output
Fetch cycle
Fetch cycle
S1
S1
S2
S2
S3
S3
Page 49
S0
S0
(b) Output timing
(a) nput timing
: LD A, (x)
: LD (x), A
Fetch cycle
Fetch cycle
Old
S1
S1
Secondary Functions
S2
S2
S3
S3
S0
S0
Read cycle
Write cycle
S1
S1
S2
S2
New
S3
S3
TMP86F409NG
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