7-Bit Slave Address Register (Isba) - Fujitsu FR60 Hardware Manual

2
CHAPTER 15 I C INTERFACE
15.2.6

7-bit Slave Address Register (ISBA)

Rewrite the 7-bit slave address register (ISBA) while operation is stopped (EN = 0 in
ICCR).
■ 7-bit Slave Address Register (ISBA)
The configuration of the 7-bit slave address register (ISBA) is shown below.
[Bit 7] Unused bit
The value read from this bit is "0".
[Bits 6 to 0] Slave address bits (SA6 to SA0)
If a 7-bit slave address is enabled (ISMK ENSB = 1) when slave address data is received in slave mode,
these bits of ISBA and the received slave address data are compared. If a slave address match is
detected, an acknowledge is sent to the master and the AAS bit is set.
The I
access after a repeated START condition is generated.
All bits of a slave address are masked using the setting of the ISMK. The received slave address data is
overwritten to the ISBA register. This register is enabled only when AAS (IBSR register) is set to "1".
The I
specified or a general call is received.
460
Address : 00009B
H
Initial value→
2
C interface returns an acknowledge in response to reception of the address header of a 7-bit read
2
C interface does not compare ISBA and the received slave address when a 10-bit slave address is
7 6 5 4
-
SA6 SA5 SA4
R R/W R/W R/W
0 0 0 0
3 2 1 0
SA3 SA2 SA1 SA0
R/W R/W R/W R/W
0 0 0 0