UPD78F9212CS-CAB-A Renesas Electronics America, UPD78F9212CS-CAB-A Datasheet - Page 351

• Manufacturer Part Number: UPD78F9212CS-CAB-A
• Description: MCU 8BIT 4KB FLASH 16PIN
• Manufacturer: Renesas Electronics America
• Series: 78K0S/Kx1+r

Specifications of UPD78F9212CS-CAB-A

• Core Processor: 78K0S
• Core Size: 8-Bit
• Speed: 10MHz
• Peripherals: LVD, POR, PWM, WDT
• Number Of I /o: 13
• Program Memory Size: 4KB (4K x 8)
• Program Memory Type: FLASH
• Ram Size: 128 x 8
• Voltage - Supply (vcc/vdd): 2 V ~ 5.5 V
• Data Converters: A/D 4x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Connectivity: -

Option
byte
Flash
memory
Function
Selection of
system clock
source
Low-speed
internal
oscillates
Caution when
the RESET pin
is used as an
input-only port
pin (P34)
PG-FP5
programming
GUI setting
value example
Security
settings
Self
programming
function
Details of
Function
Because the X1 and X2 pins are also used as the P23/ANI3 and P22/ANI2 pins,
the conditions under which the X1 and X2 pins can be used differ depending on
the selected system clock source.
(1) Crystal/ceramic oscillation clock is selected
The X1 and X2 pins cannot be used as I/O port pins because they are used as
clock input pins.
(2) External clock input is selected
Because the X1 pin is used as an external clock input pin, P23/ANI3 cannot be
used as an I/O port pin.
(3) High-speed internal oscillation clock is selected
P23/ANI3 and P22/ANI2 can be used as I/O port pins.
If it is selected that low-speed internal oscillator cannot be stopped, the count
clock to the watchdog timer (WDT) is fixed to low-speed internal oscillation clock.
If it is selected that low-speed internal oscillator can be stopped by software,
supply of the count clock to WDT is stopped in the HALT/STOP mode, regardless
of the setting of bit 0 (LSRSTOP) of the low-speed internal oscillation mode
register (LSRCM). Similarly, clock supply is also stopped when a clock other than
the low-speed internal oscillation clock is selected as a count clock to WDT.
While the low-speed internal oscillator is operating (LSRSTOP = 0), the clock can
be supplied to the 8-bit timer H1 even in the STOP mode.
Be aware of the following when re-erasing/-writing (by on-board programming
using a dedicated flash memory programmer) an already-written device which has
been set as “The RESET pin is used as an input-only port pin (P34)” by the option
byte function. Before supplying power to the target system, connect a dedicated
flash memory programmer and turn its power on. If the power is supplied to the
target system beforehand, the flash memory programming mode cannot be
switched to.
The above values are recommended values. Depending on the usage
environment these values may change, so set them after having performed
sufficient evaluations.
After the security setting of the batch erase is set, erasure cannot be performed
for the device. In addition, even if a write command is executed, data different
from that which has already been written to the flash memory cannot be written
because the erase command is disabled.
Self programming processing must be included in the program before performing
self programming.
No instructions can be executed while a self programming command is being
executed. Therefore, clear and restart the watchdog timer counter in advance so
that the watchdog timer does not overflow during self programming. Refer to
Table 16-10 for the time taken for the execution of self programming.
Interrupts that occur during self programming can be acknowledged after self
programming mode ends. To avoid this operation, disable interrupt servicing (by
setting MK0 to FFH, and executing the DI instruction) when shifting from the
normal mode to the self programming mode with a specific sequence.
RAM is not used while a self programming command is being executed.
If the supply voltage drops or the reset signal is input while the flash memory is
being written or erased, writing/erasing is not guaranteed.
APPENDIX D LIST OF CAUTIONS
User’s Manual U16994EJ6V0UD
Cautions
p. 220
p. 221
p. 221
p. 221
p. 228
p. 231
p. 232
p. 235
p. 235
p. 235
p. 235
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