Port 9 - NEC V850E/RS1 User Manual

4.3.9 Port 9

Port 9 is a 16-bit port for which I/O settings can be controlled in 1-bit units.
(1) Port 9 functions
• 16-bit I/O port
• Port input/output specifiable in 1-bit units by port mode register 9 (PM9)
• Port mode/control mode specifiable in 1-bit units by port mode control register 9 (PMC9)
• Control mode 1, 2, 3 and 4 specifiable in 1-bit units by port function control register 9 (PFC9,
• On-chip pull-up resistor specifiable in 1-bit units by pull-up resistor option register 9 (PU9)
• On-chip pull-down resistor specifiable in 1-bit units by pull-down resistor option register 9 (PD9)
• Valid edge of external interrupts (alternate function) specifiable in 1-bit units.
See Table 4-8, "Port Type," on page 170 for alternate functions.
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PFCE9)
Specification done with external interrupt falling edge specification register 9H (INTF9H) and
external interrupt rising edge specification register 9H (INTR9H).
User's Manual U16702EE3V2UD00
Chapter 4 Port Functions
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