Figure 10.4A Block Diagram Of 8-Bit Serial I/O-2 Pins; Figure 10.4B 8-Bit Serial I/O-2 Registers - Fujitsu F2MC-8L MB89620 Series Hardware Manual

n Block Diagram of 8-bit Serial I/O-2 Pins
SPL: Pin state specification bit in the standby control register (STBC)
Note: Pins with a pull-up resistor (optional) go to the "H" level during a reset or in stop mode (SPL = "1").
n 8-bit Serial I/O-2 Registers
SMR2 (Serial 2 mode register)
SDR2 (Serial 2 data register)
R/W: Readable and writable
X : Indeterminate
n 8-bit Serial I/O-2 Interrupt Source
IRQ8: 8-bit serial I/O-2 generates an interrupt request (IRQ8) if an interrupt request output is
enabled (SMR2: SIOE = "1") when the I/O function completes input or output of 8 bits of
serial data.
MB89620 series
From the output
(SO2 and SCK2 pins only)
PDR
(Port data register)
PDR read
PDR read (for bit manipulation instructions)
Output latch
PDR write

Figure 10.4a Block Diagram of 8-bit Serial I/O-2 Pins

Address Bit 7 Bit 6 Bit 5
001E SIOF SIOE SCKE
H
R/W R/W R/W
Address Bit 7 Bit 6 Bit 5
001F
H
R/W R/W R/W

Figure 10.4b 8-bit Serial I/O-2 Registers

CHAPTER 10 8-BIT SERIAL I/O (SERIAL I/O-1 AND SERIAL I/O-2)
From the output
enable bit
(SO2 and SCK2
pins only)
Input buffer
Stop mode (SPL = "1")
Bit 4 Bit 3 Bit 2
SOE CKS1 CKS0
R/W R/W R/W
Bit 4 Bit 3 Bit 2
R/W R/W R/W
To input
(SI2 and SCK2
pins only)
Pull-up resistor
(optional)
Approx. 50 kΩ/5.0 V
Pin
P47/SI2
P46/SO2
Output Tr
P45/SCK2
Bit 1 Bit 0 Initial value
BDS SST 00000000
B
R/W R/W
Bit 1 Bit 0 Initial value
XXXXXXXX
R/W R/W
10
B
209