
13-7
ML63326 User's Manual
Chapter 13 Voice Synthesis
13
(9) Voice synthesis interrupt mode register (PCMOD0)
PCMOD0 is a 4-bit special function register (SFR) for selecting the sampling frequency of the
voice synthesis interrupt signal.
(10) Voice synthesis interrupt enable register (PCIE)
PCIE is a 4-bit special function register (SFR) that enables and disables the voice synthesis
interrupt.
—
—
—
PCF
PCMOD0 (037H)
(R/W)
bit 3
bit 2
bit 1
bit 0
Selection of the voice synthesis interrupt sampling frequency
0: Sampling at 128 Hz (initial value)
1: Sampling at 4 kHz
PC3IE
—
—
—
PCIE (036H)
(R/W)
bit 3
bit 2
bit 1
bit 0
Voice synthesis interrupt disable/enable select
0: Disabled (initial value)
1: Enabled
(8) Voice/melody-buzzer output control register 1 (PDDIR)
PDDIR is a 4-bit special function register (SFR) for controlling voice/melody-buzzer output.
PDDIR is a write-only register and all read operations to this register are ignored.
The valid bits of this register are all reset to "0" at a system reset.
Refer to: step
q
in Section 13.9.4, "Melody Output Procedure."
step
r
in Section 11.8, "Writing to External Memory."
PD3DIR
—
PD1DIR
PD0DIR
PDDIR (03BH)
(W)
bit 3
bit 2
bit 1
bit 0
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