UPD78F0537DGA(T)-9EV-A NEC, UPD78F0537DGA(T)-9EV-A Datasheet - Page 117

• Manufacturer Part Number: UPD78F0537DGA(T)-9EV-A
• Description: 8BIT MCU, 128K FLASH, 7KB RAM, SMD
• Manufacturer: NEC

Specifications of UPD78F0537DGA(T)-9EV-A

• Controller Family/series: UPD78
• No. Of I/o's: 55
• Ram Memory Size: 7KB
• Cpu Speed: 20MHz
• No. Of Timers: 8
• No. Of Pwm: RoHS Compliant
• Core Size: 8bit
• Program Memory Size: 128KB
• Oscillator Type: External, Internal

<R>
5.2.4 Port 3
using port mode register 3 (PM3). When the P30 to P33 pins are used as an input port, use of an on-chip pull-up
resistor can be specified in 1-bit units by pull-up resistor option register 3 (PU3).
Port 3 is a 4-bit I/O port with an output latch. Port 3 can be set to the input mode or output mode in 1-bit units
This port can also be used for external interrupt request input and timer I/O.
Reset signal generation sets port 3 to input mode.
Figures 5-14 and 5-15 show block diagrams of port 3.
Cautions 1. In the product with an on-chip debug function (
Note OCD1A is provided to the
Remarks 1. For the product ranks, consult an NEC Electronics sales representative.
2. Only for the
2. For products without an on-chip debug function and with the flash memory of 48 KB or more
OCD0B) when the on-chip debug function is used.
supporting on-chip debugging (QB-78K0MINI or QB-MINI2), see CHAPTER 27 ON-CHIP DEBUG
FUNCTION (
P31/INTP2/OCD1A
(
and for the product with an on-chip debug function (
OCD1A
• P31/INTP2/OCD1A
The above connection is not necessary when writing the flash memory by means of self
programming.
µ
PD78F0534, 78F0535, 78F0536, and 78F0537) and having a product rank of “I”, “K”, or “E”,
Note
as follows when writing the flash memory with a flash programmer.
µ
µ
PD78F0537D, X1 and X2 can be used as on-chip debug mode setting pins (OCD0A,
PD78F0537D ONLY).
µ
Note
PD78F0537D only.
Note
pin down before a reset release, to prevent malfunction.
: Connect to EV
CHAPTER 5 PORT FUNCTIONS
User’s Manual U17260EJ6V0UD
SS
via a resistor (10 kΩ: recommended).
For how to connect an in-circuit emulator
µ
PD78F0537D), be sure to pull the
µ
PD78F0537D), connect P31/INTP2/
117