psd813f1a-90ut STMicroelectronics, psd813f1a-90ut Datasheet - Page 11

• Manufacturer Part Number: psd813f1a-90ut
• Description: Flash In-system Programmable Isp Peripherals For 8-bit Mcus
• Manufacturer: STMicroelectronics

7.0
Table 5.
PSD913F1
Pin
Descriptions
10
PSD913F1
The following table describes the pin names and pin functions of the PSD913F1. Pins that
have multiple names and/or functions are defined using PSDsoft.
Pin Name
ADIO0-7
ADIO8-15
CNTL0
CNTL1
(PLCC)
Pin* Type
30-37
39-46
47
50
I/O
I/O
I
I
This is the lower Address/Data port. Connect your MCU
address or address/data bus according to the following rules:
1. If your MCU has a multiplexed address/data bus where
2. If your MCU does not have a multiplexed address/data
3. If you are using an 80C51XA in burst mode, connect
ALE or AS latches the address. The PSD drives data out only
if the read signal is active and one of the PSD functional
blocks was selected. The addresses on this port are passed
to the PLDs.
This is the upper Address/Data port. Connect your MCU
address or address/data bus according to the following rules:
1. If your MCU has a multiplexed address/data bus where
2. If your MCU does not have a multiplexed address/data
3. If you are using an 80C251 in page mode, connect
4. If you are using an 80C51XA in burst mode, connect
ALE or AS latches the address. The PSD drives data out only
if the read signal is active and one of the PSD functional
blocks was selected. The addresses on this port are passed
to the PLDs.
The following control signals can be connected to this port,
based on your MCU:
1. WR — active-low write input.
2. R_W — active-high read/active low write input.
This pin is connected to the PLDs. Therefore, these signals
can be used in decode and other logic equations.
The following control signals can be connected to this port,
based on your MCU:
1. RD — active-low read input.
2. E — E clock input.
3. DS — active-low data strobe input.
4. PSEN — connect PSEN to this port when it is being used
the data is multiplexed with the lower address bits,
connect AD[0:7] to this port.
bus, or you are using an 80C251 in page mode, connect
A[0:7] to this port.
A4/D0 through A11/D7 to this port.
the data is multiplexed with the lower address bits,
connect A[8:15] to this port.
bus, connect A[8:15] to this port.
AD[8:15] to this port.
A12/D8 through A19/D15 to this port.
as an active-low read signal. For example, when the
80C251 outputs more than 16 address bits, PSEN is
actually the read signal.
This pin is connected to the PLDs. Therefore, these
signals can be used in decode and other logic equations.
Description
Preliminary