HD4074329S Renesas Electronics America, HD4074329S Datasheet - Page 34

• 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

HD404328 Series
Stop Mode: The MCU enters stop mode if the STOP instruction is executed in active mode when TMA3 =
0. In this mode, the system oscillator stops, which stops all MCU functions as well.
The stop mode is terminated by a RESET input as shown in figure 12. RESET must be high for at least one
t
is cancelled, all RAM contents are retained, but the accuracy of the contents of the accumulator, B register,
W register, X/SPX register, Y/SPY register, carry flag, and serial data register cannot be guaranteed.
Watch Mode: The MCU enters watch mode if the STOP instruction is executed in active mode when
TMA3 = 1, or if the STOP or SBY instruction is executed in subactive mode.
The watch mode is terminated by a RESET input or a timer-A/INT
RESET input, refer to the Stop Mode section. When terminated by a timer-A/INT
MCU enters active mode if LSON is 0, or subactive mode if LSON is 1. After an interrupt request is
generated, the time required to enter active mode is t
2T + t
30
RC
to stabilize oscillation (refer to the AC Characteristics section). When the MCU restarts after stop mode
RC
Oscillator
Internal clock
RESET
) for an INT
0
STOP instruction execution
interrupt, as shown in figures 13 and 14.
Figure 12 Timing of Stop Mode Cancellation
Stop mode
RC
for a timer A interrupt, and T
t
res
t
RC
(stabilization time)
t
res
0
interrupt request. For details of
X
0
(where T + t
interrupt request, the
RC
< T
X
<