S3C7238 Datasheet, PDF (16/36 Pages) Samsung semiconductor – The S3C7238/C7235 single-chip CMOS microcontroller has been designed for high performance using Samsungs newest 4-bit CPU core, SAM47 (Samsung Arrange

ELECTRICAL DATA
S3C7238/P7238/C7235/P7235
CPU Clock
1.5 MHz
1.0475 MHz
1.00 MHz
750 kHz
500 kHz
250 kHz
Main OSC. Frequency
6 MHz
4.19 MHz
3 MHz
15.6 kHz
1 1.8
3
4
5
6
7
Supply Voltage (V)
CPU CLOCK = 1/n x oscillator frequency (n = 4, 8, 64)
Figure 14-1. Standard Operating Voltage Range
Table 14-7. RAM Data Retention Supply Voltage in Stop Mode
(T_A = – 40 ^°C to + 85 ^°C)
Parameter
Data retention supply voltage
Data retention supply current
Release signal set time
Oscillator stabilization wait
time ⁽¹⁾
Symbol
V_DDDR
I_DDDR
t_SREL
t_WAIT
Conditions
Normal operation
V_DDDR = 1.8 V
Normal operation
Released by RESET
Released by interrupt
Min
Typ
Max
Unit
1.8
–
6.5
V
–
0.1
10
µA
0
–
–
µs
–
2¹⁷/fx
–
ms
–
(2)
–
NOTES:
1. During oscillator stabilization wait time, all CPU operations must be stopped to avoid instability during oscillator
start-up.
2. Use the basic timer mode register (BMOD) interval timer to delay execution of CPU instructions during the wait time.
14-8