NEC UPD703116 User Manual page 483

(3) Clocked serial interface receive buffer registers 0, 1 (SIRB0, SIRB1)
The SIRBn register is a 16-bit buffer register that stores receive data (n = 0, 1).
When the receive-only mode is set (TRMDn bit of CSIMn register = 0), the reception operation is started by
reading data from the SIRBn register.
These registers are read-only, in 16-bit units.
In addition to reset input, these registers can also be initialized by clearing (0) the CSICAEn bit of the CSIMn
register.
Cautions 1. Read the SIRBn register only when the 16-bit data length has been set (CCL bit of
CSIMn register = 1).
2. When the single transfer mode has been set (AUTO bit of CSIMn register = 0), perform
read operation only in the idle state (CSOTn bit of CSIMn register = 0). If the SIRBn
register is read during data transfer, the data cannot be guaranteed.
15 14 13 12
SIRB0 SIRB SIRB SIRB SIRB
15 14 13 12
15 14 13 12
SIRB1 SIRB SIRB SIRB SIRB
15 14 13 12
Bit position Bit name
15 to 0 SIRB15 to
SIRB0
CHAPTER 10 SERIAL INTERFACE FUNCTION
11 10 9 8 7 6
SIRB SIRB SIRB SIRB SIRB SIRB
11 10 9 8 7 6
11 10 9 8 7 6
SIRB SIRB SIRB SIRB SIRB SIRB
11 10 9 8 7 6
Stores receive data.
User's Manual U14492EJ5V0UD
5 4 3 2 1 0
SIRB SIRB SIRB SIRB SIRB SIRB
5 4 3 2 1 0
5 4 3 2 1 0
SIRB SIRB SIRB SIRB SIRB SIRB
5 4 3 2 1 0
Function
Address Initial value
FFFFF902H 0000H
Address Initial value
FFFFF912H 0000H
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