HD4074329S Renesas Electronics America, HD4074329S Datasheet - Page 75

• Manufacturer Part Number: HD4074329S
• Description: MCU 4-Bit HMCS400 CISC 20KB EPROM 3.3V/5V 64-Pin SDIP
• Manufacturer: Renesas Electronics America

Specifications of HD4074329S

• Package: 64SDIP
• Family Name: HMCS400
• Maximum Speed: 4.5 MHz
• Ram Size: 268 Byte
• Program Memory Size: 20 KB
• Operating Supply Voltage: 3.3|5 V
• Data Bus Width: 4 Bit
• Program Memory Type: EPROM
• Number Of Programmable I/os: 35
• On-chip Adc: 4-chx8-bit
• Operating Temperature: -20 to 75 °C
• Number Of Timers: 3

Warnings
1. Always specify addresses $0000 to $7FFF when programming with a PROM programmer. If address
2. Make sure that the PROM programmer, socket adapter, and LSI are aligned correctly (their pin 1
3. PROM programmers have two voltages (V
Programming and Verification: The built-in PROM of the MCU can be programmed at high speed
without risk of voltage stress or damage to data reliability.
Programming and verification modes are selected as shown in table 36.
For details of PROM programming, refer to the Notes on PROM Programming section.
Table 36
Mode
Programming
Verification
Programming inhibited
Erasure (Window Package)
Data in the PROM is erased by exposing the LSI to ultraviolet light of a wavelength of 2537 Å for an
integrated dose of at least 15 W.s/cm
3 cm away from an ultraviolet lamp with a rating of 12,000 W/cm
all PROM bits are set to 1.
For details of packages with windows, refer to the Notes on Window Packages section.
$8000 or higher is accessed, the PROM may not be programmed or verified correctly. Set all data in
unused addresses to $FF.
Note that the plastic-package version cannot be erased and reprogrammed, but the ceramic window-
package version can be reprogrammed after being exposed to ultraviolet light.
positions match), otherwise overcurrents may damage the LSI. Before starting programming, make
sure that the LSI is firmly fixed in the socket adapter and the socket adapter is firmly fixed in the
programmer.
require a V
PROM Mode Selection
PP
of 12.5 V—the 21-V setting will damage them. 12.5 V is the Intel 27256 setting.
Pin
CE
Low
High
High
2
. These conditions can be satisfied by placing the LSI about 2 cm to
OE
High
Low
High
PP
): 12.5 V and 21 V. Remember that ZTAT
V
V
V
V
PP
PP
PP
PP
O
Data input
Data output
High impedence
0
2
–O
for about 20 minutes. After erasure,
7
HD404328 Series
devices
71