UPD70F3786GJ-GAE-AX Renesas Electronics America, UPD70F3786GJ-GAE-AX Datasheet - Page 194

• Manufacturer Part Number: UPD70F3786GJ-GAE-AX
• Description: MCU 32BIT V850ES/JX3-E 144-LQFP
• Manufacturer: Renesas Electronics America
• Series: V850ES/Jx3-Er

Specifications of UPD70F3786GJ-GAE-AX

• Core Processor: RISC
• Core Size: 32-Bit
• Speed: 50MHz
• Connectivity: CAN, CSI, EBI/EMI, Ethernet, I²C, UART/USART, USB
• Peripherals: DMA, LVD, PWM, WDT
• Number Of I /o: 100
• Program Memory Size: 512KB (512K x 8)
• Program Memory Type: FLASH
• Ram Size: 124K x 8
• Voltage - Supply (vcc/vdd): 2.85 V ~ 3.6 V
• Data Converters: A/D 12x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

192
(b) Cautions on alternate-function mode (input)
The signal input to the alternate-function block is low level when the PMCn.PMCnm bit is 0 due to the AND
output of the PMCn register set value and the pin level. Thus, depending on the port setting and alternate-
function operation enable timing, unexpected operations may occur. Therefore, switch between the port
mode and alternate-function mode in the following sequence.
• To switch from port mode to alternate-function mode (input)
• To switch from alternate-function mode (input) to port mode
Concrete examples are shown in [Example 1] and [Example 2].
[Example 1] Switching from general-purpose port (P02) to external interrupt pin (NMI)
Set the pins to the alternate-function mode using the PMCn register and then enable the alternate-
function operation.
Stop the alternate-function operation and then switch the pins to the port mode.
The setting procedure that may cause malfunction on switching from the P41 pin to the SCL01
pin is shown below.
In <2>, I
to the pin. In the CMOS output period of <2> or <3>, unnecessary current may be generated.
<1>
<2>
<3>
<4>
Setting Procedure
When the P02/NMI pin is pulled up as shown in Figure 4-4 and the rising edge is specified
by the NMI pin edge detection setting, even though a high level is input continuously to the
NMI pin when switching from the P02 pin to the an NMI pin (PMC02 bit = 0 → 1), this is
detected as a rising edge as if a low level changed to a high level, and an NMI interrupt
occurs.
To avoid this, set the NMI pin’s valid edge after switching from the P02 pin to the NMI pin.
2
C communication may be affected since the alternate-function SOF0 output is output
Initial value
(PMC41 bit = 0,
PFC41 bit = 0,
PF41 bit = 0)
PMC41 bit ← 1
PFC41 bit ← 1
PF41 bit ← 1
CHAPTER 4 PORT FUNCTIONS
Setting Contents
User’s Manual U19601EJ2V0UD
Port mode (input)
SOF0 output
SCL01 I/O
SCL01 I/O
Pin State
Hi-Z
Low level (high level depending on the
CSIF0 setting)
High level (CMOS output)
Hi-Z (N-ch open-drain output)
Pin Level