UPD70F3740GC-UEU-AX Renesas Electronics America, UPD70F3740GC-UEU-AX Datasheet - Page 197

• Manufacturer Part Number: UPD70F3740GC-UEU-AX
• Description: MCU 32BIT V850ES/JX3 100-LQFP
• Manufacturer: Renesas Electronics America
• Series: V850ES/Jx3r

Specifications of UPD70F3740GC-UEU-AX

• Core Processor: RISC
• Core Size: 32-Bit
• Speed: 32MHz
• Connectivity: CSI, EBI/EMI, I²C, UART/USART
• Peripherals: DMA, LVD, PWM, WDT
• Number Of I /o: 84
• Program Memory Size: 512KB (512K x 8)
• Program Memory Type: FLASH
• Ram Size: 40K x 8
• Voltage - Supply (vcc/vdd): 2.85 V ~ 3.6 V
• Data Converters: A/D 12x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

V850ES/JG3
R01UH0015EJ0300 Rev.3.00
Sep 30, 2010
(b) Example of setting subclock operation → main clock operation
<1> MCK bit ← 0:
<2> Insert waits by the program and wait until the oscillation stabilization time of the main clock elapses.
<3> CK3 bit ← 0:
<4> Main clock operation:
Caution Enable operation of the on-chip peripheral functions operating with the main clock only after
[Description example]
<1> _START_MAIN_OSC :
<2> movea
<3> st.b
<4> _CHECK_CLS :
Remark The description above is simply an example. Note that in <4> above, the CLS bit is read in a
_DMA_DISABLE:
clrl
st.b
clr1
_WAIT_OST :
nop
nop
nop
addi
cmp
bne
clr1
tst1
bnz
_DMA_ENABLE:
setl
the oscillation of the main clock stabilizes. If their operations are enabled before the lapse
of the oscillation stabilization time, a malfunction may occur.
closed loop.
0, DCHCn[r0]
r0, PRCMD[r0]
6, PCC[r0]
0x55, r0, r11
-1, r11, r11
r0, r11
r0, PRCMD[r0]
3, PCC[r0]
4, PCC[r0]
_CHECK_CLS
0, DCHCn[r0]
Main clock starts oscillating
Use of a bit manipulation instruction is recommended. Do not change the CK2
to CK0 bits.
It takes the following time after the CK3 bit is set until main clock operation is
started.
Therefore, insert one NOP instruction immediately after setting the CK3 bit to 0
or read the CLS bit to check if main clock operation has started.
_WAIT_OST
Max.: 1/f
XT
(1/subclock frequency)
CHAPTER 6 CLOCK GENERATION FUNCTION
-- DMA operation disabled. n = 0 to 3
-- Release of protection of special registers
-- Main clock starts oscillating.
-- Wait for oscillation stabilization time.
-- CK3 ← 0
-- Wait until main clock operation starts.
-- DMA operation enabled. n = 0 to 3
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